Cmd-Q but Logos refused to go away. The Synchronizing dialog appeared briefly, then the menu bar cleared, except for the Logos Menu, and all L5 windows remained open. Took a sample of the process
5545.LogosLogs.jackcav.20130924-075014.zip
Went to work and returned several hours later to find L5 still hanging around. Took another sample
7651.LogosLogs.jackcav.20130924-152319.zip
Forced L5 to go away (force quit with Cmd-Opt-Esc). Archived logs
0601.LogosLogs.jackcav.20130924-152350.zip
Restarted L5 without incident. Apple did not request a crash report, neither did L5 upon restart.