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Searched and didnt find anything so i thought i would ask if anyone else notices this problem.

In photoshop working on something and ill do an action all of a sudden i get the umbrella of death. Around 30 seconds later it stops and i can go back to work. Im on a pretty fast Mac Pro so i don't know why i would be getting this compared to my iMac g5 which never gets this. The only thing i can think is i have never ran folding before. I turned if off for awhile and i noticed it stopped. Iam Crazy?? or does anyone else have this happen?