Yeah, the issue still continues for me. I thought that I had it resolved by doing a NVRAM reset, but the dreaded issue came back. I initially noticed the issue would occur much faster if I was using VirtualBox, but after updating VirtualBox the issue isn't as prevalent. I'm also able to make the issue occur much quicker if I'm running a Flash based game in the browser. When the issue has occurs and I get back into the machine remotely and open the console I can see that the Window Server has gone sideways. Related output follows:
12/18/2013 7:16:10.410 PM WindowServer[174]: Received display connect changed for display 0x3f003c
12/18/2013 7:16:10.410 PM WindowServer[174]: Found 1 modes for display 0x003f003c [1, 0]
12/18/2013 7:16:10.410 PM WindowServer[174]: Received display connect changed for display 0x3f003d
12/18/2013 7:16:10.410 PM WindowServer[174]: Found 1 modes for display 0x003f003d [1, 0]
12/18/2013 7:16:10.410 PM WindowServer[174]: Received display connect changed for display 0x2b344c12
12/18/2013 7:16:10.410 PM WindowServer[174]: Found 1 modes for display 0x2b344c12 [1, 0]
12/18/2013 7:16:10.411 PM WindowServer[174]: Display 0x2b344c12 changed state to offline
12/18/2013 7:16:10.413 PM WindowServer[174]: No display devices are on-line. Switching to virtual display mode
12/18/2013 7:16:10.441 PM WindowServer[174]: Display 0x41dc9d02: GL mask 0x4; bounds (0, 0)[2048 x 1152], 25 modes available
Main, Active, on-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0
UUID 0x31bd715b0bc1c0181781829c86b47a3c, ColorProfile { 2, "HD 709-A"}
12/18/2013 7:16:10.442 PM WindowServer[174]: Display 0x41dc9d03: GL mask 0x8; bounds (3072, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:10.442 PM WindowServer[174]: Display 0x41dc9d00: GL mask 0x1; bounds (3073, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:10.442 PM WindowServer[174]: Display 0x41dc9d01: GL mask 0x2; bounds (3074, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:10.452 PM WindowServer[174]: Display added
12/18/2013 7:16:10.452 PM WindowServer[174]: Display removed
12/18/2013 7:16:10.454 PM WindowServer[174]: Display 0x41dc9d02: GL mask 0x4; bounds (0, 0)[2048 x 1152], 25 modes available
Main, Active, on-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0
UUID 0x31bd715b0bc1c0181781829c86b47a3c, ColorProfile { 2, "HD 709-A"}
12/18/2013 7:16:10.454 PM WindowServer[174]: Display 0x41dc9d03: GL mask 0x8; bounds (3072, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:10.454 PM WindowServer[174]: Display 0x41dc9d00: GL mask 0x1; bounds (3073, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:10.454 PM WindowServer[174]: Display 0x41dc9d01: GL mask 0x2; bounds (3074, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:16:12.453 PM WindowServer[174]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
12/18/2013 7:16:12.569 PM WindowServer[174]: Display 0x41dc9d02: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:16:12.584 PM WindowServer[174]: Display 0x41dc9d02: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:18:58.699 PM WindowServer[174]: disable_update_timeout: UI updates were forcibly disabled by application "Console" for over 1.00 seconds. Server has re-enabled them.
12/18/2013 7:18:58.856 PM WindowServer[174]: common_reenable_update: UI updates were finally reenabled by application "Console" after 1.16 seconds (server forcibly re-enabled them after 1.00 seconds)
12/18/2013 7:20:58.005 PM WindowServer[174]: CGXGetConnectionProperty: Invalid connection 53251
12/18/2013 7:20:58.005 PM WindowServer[174]: CGXGetConnectionProperty: Invalid connection 53251
12/18/2013 7:20:58.006 PM WindowServer[174]: CGXGetConnectionProperty: Invalid connection 53251
12/18/2013 7:20:58.006 PM WindowServer[174]: CGXGetConnectionProperty: Invalid connection 53251
12/18/2013 7:20:58.006 PM WindowServer[174]: CGXOrderWindowList: Invalid window 321 (index 0/1)
12/18/2013 7:20:58.006 PM WindowServer[174]: CGXGetConnectionProperty: Invalid connection 53251
12/18/2013 7:20:58.062 PM WindowServer[174]: CGXSetWindowListSystemAlpha: Invalid window 321 (index 0/1)
12/18/2013 7:22:16.960 PM WindowServer[205]: Server is starting up
12/18/2013 7:22:17.028 PM WindowServer[205]: Session 256 retained (2 references)
12/18/2013 7:22:17.028 PM WindowServer[205]: Session 256 released (1 references)
12/18/2013 7:22:17.059 PM WindowServer[205]: Session 256 retained (2 references)
12/18/2013 7:22:17.062 PM WindowServer[205]: init_page_flip: page flip mode is on
12/18/2013 7:22:17.186 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.455 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.457 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.461 PM WindowServer[205]: mux_initialize: Couldn't find any matches
12/18/2013 7:22:17.461 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.461 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.462 PM WindowServer[205]: Found 1 modes for display 0x00000000 [1, 0]
12/18/2013 7:22:17.468 PM WindowServer[205]: WSMachineUsesNewStyleMirroring: true
12/18/2013 7:22:17.469 PM WindowServer[205]: Display 0x41dc9d03: GL mask 0x8; bounds (0, 0)[1280 x 1024], 25 modes available
Main, Active, on-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.469 PM WindowServer[205]: Display 0x41dc9d00: GL mask 0x1; bounds (0, 0)[1280 x 1024], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.469 PM WindowServer[205]: Display 0x41dc9d01: GL mask 0x2; bounds (0, 0)[1280 x 1024], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.469 PM WindowServer[205]: Display 0x41dc9d02: GL mask 0x4; bounds (0, 0)[1280 x 1024], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.470 PM WindowServer[205]: Display 0x41dc9d03: GL mask 0x8; bounds (0, 0)[1280 x 1024], 25 modes available
Main, Active, on-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.470 PM WindowServer[205]: Display 0x41dc9d00: GL mask 0x1; bounds (2304, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.470 PM WindowServer[205]: Display 0x41dc9d01: GL mask 0x2; bounds (2305, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.470 PM WindowServer[205]: Display 0x41dc9d02: GL mask 0x4; bounds (2306, 0)[1 x 1], 2 modes available
off-line, enabled, built-in, Vendor 756e6b6e, Model 76697274, S/N 0, Unit 2, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/18/2013 7:22:17.470 PM WindowServer[205]: CGXPerformInitialDisplayConfiguration
12/18/2013 7:22:17.470 PM WindowServer[205]: Display 0x41dc9d03: Unit 3; Vendor 0x756e6b6e Model 0x76697274 S/N 0 Dimensions 0.00 x 0.00; online enabled built-in, Bounds (0,0)[1280 x 1024], Rotation 0, Resolution 1
12/18/2013 7:22:17.471 PM WindowServer[205]: Display 0x41dc9d00: Unit 0; Vendor 0x756e6b6e Model 0x76697274 S/N 0 Dimensions 0.00 x 0.00; offline enabled built-in, Bounds (2304,0)[1 x 1], Rotation 0, Resolution 1
12/18/2013 7:22:17.471 PM WindowServer[205]: Display 0x41dc9d01: Unit 1; Vendor 0x756e6b6e Model 0x76697274 S/N 0 Dimensions 0.00 x 0.00; offline enabled built-in, Bounds (2305,0)[1 x 1], Rotation 0, Resolution 1
12/18/2013 7:22:17.471 PM WindowServer[205]: Display 0x41dc9d02: Unit 2; Vendor 0x756e6b6e Model 0x76697274 S/N 0 Dimensions 0.00 x 0.00; offline enabled built-in, Bounds (2306,0)[1 x 1], Rotation 0, Resolution 1
12/18/2013 7:22:17.660 PM WindowServer[205]: GLCompositor: GL renderer id 0x01024400, GL mask 0x0000000f, accelerator 0x00003533, unit 0, caps QEX|MIPMAP, vram 1024 MB
12/18/2013 7:22:17.660 PM WindowServer[205]: GLCompositor: GL renderer id 0x01024400, GL mask 0x0000000f, texture max 16384, viewport max {16384, 16384}, extensions FPRG|NPOT|GLSL|FLOAT
12/18/2013 7:22:17.660 PM WindowServer[205]: GLCompositor enabled for tile size [256 x 256]
12/18/2013 7:22:17.660 PM WindowServer[205]: CGXGLInitMipMap: mip map mode is on
12/18/2013 7:22:19.471 PM WindowServer[205]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
12/18/2013 7:22:21.238 PM WindowServer[205]: Display 0x41dc9d03: Unit 3; ColorProfile { 2, "Display"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:22:21.249 PM WindowServer[205]: Display 0x41dc9d03: Unit 3; ColorProfile { 2, "Display"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:22:21.264 PM WindowServer[205]: Display 0x41dc9d03: Unit 3; ColorProfile { 2, "Display"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:22:22.453 PM WindowServer[205]: [checkin] Another euid=0 process is checking in, which matches the existing session id 0x186a4, but it isn't loginwindow. pid=257 name=ARDAgent
12/18/2013 7:23:08.070 PM WindowServer[205]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
12/18/2013 7:23:08.412 PM WindowServer[205]: Display 0x41dc9d03: Unit 3; ColorProfile { 2, "Display"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/18/2013 7:23:11.374 PM WindowServer[205]: disable_update_timeout: UI updates were forcibly disabled by application "SystemUIServer" for over 1.00 seconds. Server has re-enabled them.
12/18/2013 7:23:11.493 PM WindowServer[205]: common_reenable_update: UI updates were finally reenabled by application "SystemUIServer" after 1.12 seconds (server forcibly re-enabled them after 1.00 seconds)
12/18/2013 7:23:37.869 PM WindowServer[205]: disable_update_timeout: UI updates were forcibly disabled by application "SystemUIServer" for over 1.00 seconds. Server has re-enabled them.
12/18/2013 7:23:38.130 PM WindowServer[205]: common_reenable_update: UI updates were finally reenabled by application "SystemUIServer" after 1.26 seconds (server forcibly re-enabled them after 1.00 seconds)
12/18/2013 7:24:59.189 PM WindowServer[205]: disable_update_timeout: UI updates were forcibly disabled by application "Activity Monitor" for over 1.00 seconds. Server has re-enabled them.
12/18/2013 7:24:59.191 PM WindowServer[205]: common_reenable_update: UI updates were finally reenabled by application "Activity Monitor" after 1.00 seconds (server forcibly re-enabled them after 1.00 seconds)
12/18/2013 7:26:24.742 PM WindowServer[205]: CGXGetConnectionProperty: Invalid connection 46347
12/18/2013 7:26:24.742 PM WindowServer[205]: CGXGetConnectionProperty: Invalid connection 46347
12/18/2013 7:26:24.743 PM WindowServer[205]: CGXGetConnectionProperty: Invalid connection 46347
12/18/2013 7:26:24.743 PM WindowServer[205]: CGXGetConnectionProperty: Invalid connection 46347
12/18/2013 7:26:24.743 PM WindowServer[205]: CGXGetConnectionProperty: Invalid connection 46347
-------
At this point I just end up turning off the mini for the night and started it back up in the morning without issue.
Here's what the Window Server reports when things are working normally after a bootup:
12/19/2013 8:00:31.085 AM WindowServer[212]: Server is starting up
12/19/2013 8:00:41.340 AM WindowServer[212]: Session 256 retained (2 references)
12/19/2013 8:00:41.340 AM WindowServer[212]: Session 256 released (1 references)
12/19/2013 8:00:41.359 AM WindowServer[212]: Session 256 retained (2 references)
12/19/2013 8:00:41.361 AM WindowServer[212]: init_page_flip: page flip mode is on
12/19/2013 8:00:44.158 AM WindowServer[212]: Found 1 modes for display 0x00000000 [1, 0]
12/19/2013 8:00:44.161 AM WindowServer[212]: Found 1 modes for display 0x00000000 [1, 0]
12/19/2013 8:00:44.165 AM WindowServer[212]: Found 24 modes for display 0x00000000 [18, 6]
12/19/2013 8:00:44.169 AM WindowServer[212]: mux_initialize: Couldn't find any matches
12/19/2013 8:00:44.170 AM WindowServer[212]: Found 24 modes for display 0x00000000 [18, 6]
12/19/2013 8:00:44.234 AM WindowServer[212]: Found 1 modes for display 0x00000000 [1, 0]
12/19/2013 8:00:44.234 AM WindowServer[212]: Found 1 modes for display 0x00000000 [1, 0]
12/19/2013 8:00:44.268 AM WindowServer[212]: WSMachineUsesNewStyleMirroring: true
12/19/2013 8:00:44.268 AM WindowServer[212]: MPServiceForDisplayDevice: Invalid device alias (0)
12/19/2013 8:00:44.268 AM WindowServer[212]: Display 0x2b344c12: GL mask 0x4; bounds (0, 0)[2048 x 1152], 24 modes available
Main, Active, on-line, enabled, boot, Vendor 10ac, Model d01d, S/N 334d4b53, Unit 2, Rotation 0
UUID 0x31bd715b0bc1c0181781829c86b47a3c
12/19/2013 8:00:44.268 AM WindowServer[212]: Display 0x003f003f: GL mask 0x8; bounds (0, 0)[1920 x 1200], 2 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.269 AM WindowServer[212]: Display 0x003f003c: GL mask 0x1; bounds (0, 0)[0 x 0], 1 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.269 AM WindowServer[212]: Display 0x003f003d: GL mask 0x2; bounds (0, 0)[0 x 0], 1 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.269 AM WindowServer[212]: WSSetWindowTransform: Singular matrix
12/19/2013 8:00:44.269 AM WindowServer[212]: WSSetWindowTransform: Singular matrix
12/19/2013 8:00:44.343 AM WindowServer[212]: Display 0x2b344c12: GL mask 0x4; bounds (0, 0)[2048 x 1152], 24 modes available
Main, Active, on-line, enabled, boot, Vendor 10ac, Model d01d, S/N 334d4b53, Unit 2, Rotation 0
UUID 0x31bd715b0bc1c0181781829c86b47a3c
12/19/2013 8:00:44.343 AM WindowServer[212]: Display 0x003f003f: GL mask 0x8; bounds (3072, 0)[1 x 1], 2 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 3, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.343 AM WindowServer[212]: Display 0x003f003c: GL mask 0x1; bounds (3073, 0)[1 x 1], 1 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 0, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.343 AM WindowServer[212]: Display 0x003f003d: GL mask 0x2; bounds (3074, 0)[1 x 1], 1 modes available
off-line, enabled, Vendor ffffffff, Model ffffffff, S/N ffffffff, Unit 1, Rotation 0
UUID 0xffffffffffffffffffffffffffffffff
12/19/2013 8:00:44.344 AM WindowServer[212]: CGXPerformInitialDisplayConfiguration
12/19/2013 8:00:44.344 AM WindowServer[212]: Display 0x2b344c12: Unit 2; Vendor 0x10ac Model 0xd01d S/N 860703571 Dimensions 20.08 x 11.42; online enabled, Bounds (0,0)[2048 x 1152], Rotation 0, Resolution 1
12/19/2013 8:00:44.344 AM WindowServer[212]: Display 0x003f003f: Unit 3; Vendor 0xffffffff Model 0xffffffff S/N -1 Dimensions 0.00 x 0.00; offline enabled, Bounds (3072,0)[1 x 1], Rotation 0, Resolution 1
12/19/2013 8:00:44.344 AM WindowServer[212]: Display 0x003f003c: Unit 0; Vendor 0xffffffff Model 0xffffffff S/N -1 Dimensions 0.00 x 0.00; offline enabled, Bounds (3073,0)[1 x 1], Rotation 0, Resolution 1
12/19/2013 8:00:44.344 AM WindowServer[212]: Display 0x003f003d: Unit 1; Vendor 0xffffffff Model 0xffffffff S/N -1 Dimensions 0.00 x 0.00; offline enabled, Bounds (3074,0)[1 x 1], Rotation 0, Resolution 1
12/19/2013 8:00:44.362 AM WindowServer[212]: GLCompositor: GL renderer id 0x01024400, GL mask 0x0000000f, accelerator 0x0000344b, unit 0, caps QEX|MIPMAP, vram 1024 MB
12/19/2013 8:00:44.363 AM WindowServer[212]: GLCompositor: GL renderer id 0x01024400, GL mask 0x0000000f, texture max 16384, viewport max {16384, 16384}, extensions FPRG|NPOT|GLSL|FLOAT
12/19/2013 8:00:44.363 AM WindowServer[212]: GLCompositor enabled for tile size [256 x 256]
12/19/2013 8:00:44.363 AM WindowServer[212]: CGXGLInitMipMap: mip map mode is on
12/19/2013 8:00:44.621 AM WindowServer[212]: Display 0x2b344c12: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/19/2013 8:00:44.950 AM WindowServer[212]: MPAccessSurfaceForDisplayDevice: Set up page flip mode on display 0x2b344c12 device: 0x7ff968712000 isBackBuffered: 1 numComp: 3 numDisp: 3
12/19/2013 8:00:44.950 AM WindowServer[212]: _CGXGLDisplayContextForDisplayDevice: acquired display context (0x7ff968712000) - enabling OpenGL
12/19/2013 8:00:46.336 AM WindowServer[212]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
12/19/2013 8:00:46.358 AM WindowServer[212]: Display 0x2b344c12: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/19/2013 8:00:46.426 AM WindowServer[212]: Display 0x2b344c12: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/19/2013 8:00:57.942 AM WindowServer[212]: **DMPROXY** (2) Found `/System/Library/CoreServices/DMProxy'.
12/19/2013 8:00:58.086 AM WindowServer[212]: Display 0x2b344c12: Unit 2; ColorProfile { 2, "HD 709-A"}; TransferFormula (1.000000, 1.000000, 1.000000)
12/19/2013 8:01:07.581 AM WindowServer[212]: disable_update_timeout: UI updates were forcibly disabled by application "SystemUIServer" for over 1.00 seconds. Server has re-enabled them.
12/19/2013 8:01:08.632 AM WindowServer[212]: common_reenable_update: UI updates were finally reenabled by application "SystemUIServer" after 2.29 seconds (server forcibly re-enabled them after 1.23 seconds)
12/19/2013 8:02:49.404 AM WindowServer[212]: disable_update_timeout: UI updates were forcibly disabled by application "Rdio" for over 1.00 seconds. Server has re-enabled them.
12/19/2013 8:02:50.849 AM WindowServer[212]: common_reenable_update: UI updates were finally reenabled by application "Rdio" after 2.45 seconds (server forcibly re-enabled them after 1.00 seconds)
12/19/2013 8:03:02.855 AM WindowServer[212]: disable_update_timeout: UI updates were forcibly disabled by application "Mail" for over 1.00 seconds. Server has re-enabled them.
12/19/2013 8:03:08.045 AM WindowServer[212]: disable_update_timeout: UI updates were forcibly disabled by application "Contacts" for over 1.00 seconds. Server has re-enabled them.
12/19/2013 8:03:09.682 AM WindowServer[212]: common_reenable_update: UI updates were finally reenabled by application "Contacts" after 2.64 seconds (server forcibly re-enabled them after 1.00 seconds)
12/19/2013 8:03:10.640 AM WindowServer[212]: common_reenable_update: UI updates were finally reenabled by application "Mail" after 8.79 seconds (server forcibly re-enabled them after 1.00 seconds)
12/19/2013 8:06:59.204 AM WindowServer[212]: CGXSetWindowListSystemAlpha: Invalid window 33 (index 0/1)
12/19/2013 8:07:11.978 AM WindowServer[212]: CGXSetWindowListSystemAlpha: Invalid window 87 (index 0/1)
Hopefully someone looking at the above can determine where the issue lies. I never had any problems with this setup prior to Mavericks.