2 IMac 27" 3.4 ghz i7, 8 G Ram OS 10.6.8, CS 5.5 v 7.5.1. The program worked great for 3-4 weeks. All of a sudden I can't move any of the boxes in a new or previously saved document using the selection tool. When I close the program it tells me that it crashed. Re-opening the program takes a very long time. I trashed the preferences and that didn't help. I trashed both cache folders and it seems to have solved the problem, but only temporarily. I shouldn't have to trash the cache every 2nd or 3rd time I use the program. It happens whether I'm logged in as an administrator or just a user. I don't try to open the program using different users at the same time.