Thread 0: 0 libSystem.B.dylib 0x9004a6e8 syscall_thread_switch + 8 1 com.apple.Foundation 0x92c0e580 +[NSThread sleepUntilDate:] + 152 2 com.apple.AppKit 0x93831660 -[NSUIHeartBeat _heartBeatThread:] + 1100 3 com.apple.Foundation 0x92bf6118 forkThreadForFunction + 108 4 libSystem.B.dylib 0x9002bd08 _pthread_body + 96
These are all the lines it gives that matches the look of your example.
Is that helpful or do you need more info?
Anyway I'll leave the window open, so I can get you more data if you need it...