Hi Jeremy, I am on 2.6.1, xorg-server 1.9.5 and 10.6.7 - most of the time everything is normal, except just now quartz-wm went crazy - taking all cpu time - I had to kill it - no message on the console, not sure if the sample helps. It happens just once :-) ciao christof Sampling process 842 for 3 seconds with 1 millisecond of run time between samples Sampling completed, processing symbols... Analysis of sampling quartz-wm (pid 842) every 1 millisecond Call graph: 2313 Thread_8344 DispatchQueue_1: com.apple.main-thread (serial) 2313 start 2313 main 2313 CFRunLoopRun 2313 CFRunLoopRunSpecific 2313 __CFRunLoopRun 2313 __CFRunLoopDoSources0 2313 __CFSocketPerformV0 2313 __CFSocketDoCallback 2313 x_input_run 2313 XPending 2313 _XEventsQueued 2313 _XIOError 2313 x_init_error_handler 2313 exit 2313 __cxa_finalize 2313 dyld::runTerminators(void*) 2313 ImageLoaderMachO::doTermination(ImageLoader::LinkContext const&) 2313 __KerberosInternal_krb5int_mutex_alloc 2313 0x7fff5fbfd290 2313 _sigtramp 2313 signal_handler 2313 exit 2313 __cxa_finalize 2313 __tcf_0 2313 __spin_lock 2313 Thread_8345 DispatchQueue_2: com.apple.libdispatch-manager (serial) 2313 start_wqthread 2313 _pthread_wqthread 2313 _dispatch_worker_thread2 2313 _dispatch_queue_invoke 2313 _dispatch_mgr_invoke 2313 kevent 2313 Thread_8347: com.apple.CFSocket.private 2313 thread_start 2313 _pthread_start 2313 __CFSocketManager 2313 select$DARWIN_EXTSN 2313 Thread_19389 2313 start_wqthread 2313 __spin_lock Total number in stack (recursive counted multiple, when >=5): Sort by top of stack, same collapsed (when >= 5): __spin_lock 4626 kevent 2313 select$DARWIN_EXTSN 2313 Sample analysis of process 842 written to file /dev/stdout -- public key www.hfph.mwn.de/~chwolf/ch.wolf.asc Please respect my privacy and do not make my contact information available to third parties. This email is UNCLASSIFIED.