thanks for the advice re: G4 and SETI problems. I've moved to the CLI version and SETICLI Manager and have not had a monitor or sleep problem since. I'm also cranking out more SETI units! A friend of mine is a software engineer, this is what he has to say about SETI Matt, The crash seems to be here: > Thread 1 Crashed: > #0 0x9000428c in free_list_remove_ptr > #1 0x90004ccc in szone_malloc > #2 0x90004a44 in malloc_zone_malloc > #3 0x900117b0 in _pthread_create_suspended > #4 0x015971fc in 0x15971fc > #5 0x00000000 in 0x0 This looks like some sort of memory allocation problem, i.e. they're probably dereferencing a null pointer or something. Doesn't seem to be an Apple bug at first glance. Paul M ------------------------------------------------------------------------ ----------------- Necessity is the excuse for every infringement of human freedom. It is the argument of the tyrant and the creed of the slave. -- William Pitt, 1763