This behavior continues to perplex me. My MBP, running 10.6.7, stops responding to all Apple-based software. Whatever software I have open remains open (Terminal, iTunes, Safari), but if I try to use the F-shortcuts or launch any OSX-based software not already open (System Preferences for example) it just bounces in the dock then never launches.
I also cannot reboot without hard rebooting.
I left terminal open, so I see the following in
Jun 25 19:39:02 mjb-2 com.apple.ReportCrash.Root: 2011-06-25 19:39:02.585 ReportCrash[59432:7f1f] Saved crash report for CoreServicesUIAgent version ??? (???) to /Library/Logs/DiagnosticReports/CoreServicesUIAgent_2011-06-25-193902_localhost.crash Jun 25 19:39:02 mjb-2 com.apple.ReportCrash.Root: 2011-06-25 19:39:02.586 ReportCrash[59432:b10f] Saved crash report for quicklookd version ??? (???) to /Library/Logs/DiagnosticReports/quicklookd_2011-06-25-193902_localhost.crash