Over the past few months I have been having something VERY strange happen with Photoshop (Mac, v13.0.4 x64). It appears as though it is frozen but, in actuality, if I wait a while (sometimes up to a minute) it makes things accessible again - even though it isn't doing anything that I am aware of in the background. I figured out that if I click out of Photoshop and onto an Illustrator file, and then back again to the Photoshop file, it "unfreezes" the program right away. I have tried closing and reopening Photoshop, and even reinstalling it, but the problem persists. This only happens in Photoshop. Any ideas?