I'm a new registrant on this site and thought I'd post a question on a problem that has just developed. I have been using PSE 4 on a MacBook Pro OS X for about 9 months and am just now having PSE completely shut down every fifth or sixth time I save a PSD file. The changes I've made are a firmware upgrade about a week ago for the Mac and I loaded the upgrade ACR 4.1 (for Mac). Anyone have this problem or have any ideas of what to do to resolve? I probably need to just remove and then reinstall PSE but who knows if it will solve my dilemma. TIA