Well, sorting out the reorganize memory and getting rid of the Unused Block warning didn't help. Logic still crashes one out of five times when I am adjusting a region length. Maybe I should trash the prefs - I have only done that twice today... Maybe Apple should have prefs trashing as default on exit the application? Another tip, exchange the "Logic has unexpectedly quit..." for "Sorry, I suck!" - that would really brigthen up my days...