I have the same problem with also some graphic errors (I only made the e-mail white, the other colors are as you can see)
ok here is my crash-log (I don't know exactly what you need from the crash-log, so this is the first part)
Process: Mail [4579]
Path: /Applications/Mail.app/Contents/MacOS/Mail
Identifier: com.apple.mail
Version: 7.0 (1816)
Build Info: Mail-1816000000000000~1
Code Type: X86-64 (Native)
Parent Process: launchd [218]
Responsible: Mail [4579]
User ID: 502
Date/Time: 2013-10-23 15:01:39.539 +0200
OS Version: Mac OS X 10.9 (13A603)
Report Version: 11
Anonymous UUID: EF58E893-E0EF-BF20-E92E-3BFA1B394E2E
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** setObjectForKey: key cannot be nil'
abort() called
terminating with uncaught exception of type NSException
Application Specific Backtrace 1:
0 CoreFoundation 0x00007fff8da4d41c __exceptionPreprocess + 172
1 libobjc.A.dylib 0x00007fff90857e75 objc_exception_throw + 43
2 CoreFoundation 0x00007fff8d94862e -[__NSDictionaryM setObject:forKey:] + 1102
3 Mail 0x00000001025a44c3 Mail + 103619
4 Mail 0x00000001025a3de3 Mail + 101859
5 AppKit 0x00007fff8b9ea934 -[NSTableView(NSTableViewViewBased) makeViewForTableColumn:row:] + 77
6 AppKit 0x00007fff8b9e9c67 -[NSTableRowData _addViewToRowView:atColumn:row:] + 305
7 AppKit 0x00007fff8b9e999a -[NSTableRowData _addViewsToRowView:atRow:] + 191
8 AppKit 0x00007fff8b9e6a8e -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] + 421
9 AppKit 0x00007fff8b9e680c -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] + 278
10 AppKit 0x00007fff8b9e58d6 -[NSTableRowData _unsafeUpdateVisibleRowEntries] + 1640
11 AppKit 0x00007fff8b9e516c -[NSTableRowData updateVisibleRowViews] + 230
12 AppKit 0x00007fff8ba86a9d -[NSTableView viewWillDraw] + 165
13 AppKit 0x00007fff8ba869e3 -[NSOutlineView viewWillDraw] + 172
14 AppKit 0x00007fff8ba90041 -[NSView(NSInternal) _sendViewWillDrawAndRecurse:] + 332
15 AppKit 0x00007fff8ba8fcdf -[NSView(NSLayerKitGlue) _layoutSublayersOfLayer:] + 147
16 QuartzCore 0x00007fff96d24e91 -[CALayer layoutSublayers] + 214
17 AppKit 0x00007fff8ba8fc3b _NSBackingLayerLayoutSublayers + 160
18 QuartzCore 0x00007fff96d24a65 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 363
19 AppKit 0x00007fff8bb1607e -[NSView _pullInTilesByDrawingAndAddingSubviews] + 83
20 AppKit 0x00007fff8bb16012 -[NSView _pullInExtraTilesForOverdraw] + 87
21 AppKit 0x00007fff8bb15f7e -[NSView _doIdlePrefetch] + 59
22 AppKit 0x00007fff8bb448cc -[_NSScrollingConcurrentMainThreadSynchronizer _doIdlePrefetch] + 88
23 AppKit 0x00007fff8bb43467 -[_NSScrollingConcurrentMainThreadSynchronizer _synchronize:completionHandler:] + 48
24 AppKit 0x00007fff8bb433ef __80-[_NSScrollingConcurrentMainThreadSynchronizer initWithSharedData:constantData:]_block_invoke + 140
25 libdispatch.dylib 0x00007fff98eb82ad _dispatch_client_callout + 8
26 libdispatch.dylib 0x00007fff98eba8a1 _dispatch_source_invoke + 413
27 libdispatch.dylib 0x00007fff98ebfeaa _dispatch_main_queue_callback_4CF + 244
28 CoreFoundation 0x00007fff8d9b4839 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
29 CoreFoundation 0x00007fff8d96fb14 __CFRunLoopRun + 1636
30 CoreFoundation 0x00007fff8d96f275 CFRunLoopRunSpecific + 309
31 HIToolbox 0x00007fff95017f0d RunCurrentEventLoopInMode + 226
32 HIToolbox 0x00007fff95017cb7 ReceiveNextEventCommon + 479
33 HIToolbox 0x00007fff95017abc _BlockUntilNextEventMatchingListInModeWithFilter + 65
34 AppKit 0x00007fff8b93028e _DPSNextEvent + 1434
35 AppKit 0x00007fff8b92f8db -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 122
36 AppKit 0x00007fff8b9239cc -[NSApplication run] + 553
37 AppKit 0x00007fff8b90e803 NSApplicationMain + 940
38 libdyld.dylib 0x00007fff95d035fd start + 1
39 ??? 0x0000000000000001 0x0 + 1