One more log from another instance of the behavior (aside: discussions.apple.com is displaying a minimal non-styled text in Safari as I write this):
7/27/16 12:09:31.942 PM com.apple.WebKit.Plugin.64[1775]: Failed to connect (colorGridView) outlet from (NSApplication) to (NSColorPickerGridView): missing setter or instance variable
7/27/16 12:09:31.942 PM com.apple.WebKit.Plugin.64[1775]: Failed to connect (view) outlet from (NSApplication) to (NSColorPickerGridView): missing setter or instance variable
7/27/16 12:09:32.238 PM ReportCrash[1774]: Saved crash report for x3d[1771] version ??? to /Library/Logs/DiagnosticReports/x3d_2016-07-27-120932_[REDACTED]-MacBook-Air.crash
7/27/16 12:09:32.433 PM sandboxd[126]: ([1775]) com.apple.WebKit(1775) deny system-fsctl 0x682f
7/27/16 12:09:34.047 PM acwebsecagent[231]: Connection : Failed to select modes. Code : 60
7/27/16 12:09:35.582 PM acwebsecagent[231]: Connection : Failed to connect to 50.56.166.74:80. Code : 60
7/27/16 12:09:35.583 PM acwebsecagent[231]: Connection : Caught exception. Code : 60
7/27/16 12:09:35.583 PM acwebsecagent[231]: Connection : Failed to connect externally. Code : 60
7/27/16 12:09:35.700 PM acwebsecagent[231]: Connection : Failed to connect to 64.233.177.155:80. Code : 60
7/27/16 12:09:35.701 PM acwebsecagent[231]: Connection : Caught exception. Code : 60
7/27/16 12:09:35.701 PM acwebsecagent[231]: Connection : Failed to connect externally. Code : 60
7/27/16 12:09:35.774 PM acwebsecagent[231]: Connection : Failed to connect to 64.233.177.155:80. Code : 60
7/27/16 12:09:35.774 PM acwebsecagent[231]: Connection : Caught exception. Code : 60
7/27/16 12:09:35.774 PM acwebsecagent[231]: Connection : Failed to connect externally. Code : 60
7/27/16 12:09:39.103 PM Safari[1688]: KeychainGetICDPStatus: keychain: -25300
7/27/16 12:09:39.103 PM Safari[1688]: KeychainGetICDPStatus: status: off
7/27/16 12:09:40.995 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon[1776]) Service exited due to signal: Abort trap: 6
7/27/16 12:09:40.995 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon) Service only ran for 5 seconds. Pushing respawn out by 5 seconds.
7/27/16 12:09:41.157 PM ReportCrash[1774]: Saved crash report for x3d[1776] version ??? to /Library/Logs/DiagnosticReports/x3d_2016-07-27-120941_[REDACTED]-MacBook-Air.crash
7/27/16 12:09:43.335 PM acwebsecagent[231]: Connection : Failed to select modes. Code : 60
7/27/16 12:09:44.783 PM mdworker[1654]: <<< FFR_Movie >>> ParseTrackAtom: Omitting a track that encountered error -206 during atom parsing
7/27/16 12:09:45.251 PM mds[61]: (DiskStore.Normal:2382) 7007 1.005486
7/27/16 12:09:48.155 PM com.apple.WebKit.Networking[1689]: CFNetwork SSLHandshake failed (-9806)
7/27/16 12:09:49.270 PM com.apple.WebKit.Networking[1689]: NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9806)
7/27/16 12:09:49.546 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon[1782]) Service exited due to signal: Abort trap: 6
7/27/16 12:09:49.546 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon) Service only ran for 3 seconds. Pushing respawn out by 7 seconds.
7/27/16 12:09:49.717 PM ReportCrash[1774]: Saved crash report for x3d[1782] version ??? to /Library/Logs/DiagnosticReports/x3d_2016-07-27-120949_[REDACTED]-MacBook-Air.crash
7/27/16 12:09:51.722 PM acwebsecagent[231]: Connection : Failed to select modes. Code : 60
7/27/16 12:09:56.947 PM Safari[1688]: KeychainGetICDPStatus: keychain: -25300
7/27/16 12:09:56.947 PM Safari[1688]: KeychainGetICDPStatus: status: off
7/27/16 12:09:58.114 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon[1788]) Service exited due to signal: Abort trap: 6
7/27/16 12:09:58.115 PM com.apple.xpc.launchd[1]: (com.x3.x3daemon) Service only ran for 1 seconds. Pushing respawn out by 9 seconds.
7/27/16 12:09:58.314 PM ReportCrash[1774]: Saved crash report for x3d[1788] version ??? to /Library/Logs/DiagnosticReports/x3d_2016-07-27-120958_[REDACTED]-MacBook-Air.crash
7/27/16 12:10:00.439 PM acwebsecagent[231]: Connection : Failed to select modes. Code : 60
7/27/16 12:10:08.228 PM networkd[162]: -[NETPowerManager powerPolicyForTimeslot:workload:] failed to find policy for workload 6617636 timeslot 1 / 5
(I'll stop posting logs until I hear more instructions)