Same hardware, Wade. (Quad 2.66 Xeon MacPro 1,1) 32bit, 64bit, OS10.5.8, OS10.6.3, all show the same issue. Only difference is how frequent the issue occurs. I've also got a MacBookPro, which I really don't use that much for Photoshop, which, so far.... I have NOT been able to reproduce the issue on. But again, use there has been very limited. But it makes me wonder if dual monitors or multiple video cards are what's confusing the hell out of the Window Server when PSCS5 is running. To reproduce the issue on the MacPro.. all I need do is open files. Eventually it'll occur. I can open and close files in succession, eventually I'll open one and the entire system grinds to a crawl even if that is the ONLY file open. If I'm working in some other application for a while and PS is backgrounded. Then I double-click a PS file to open it (even a flat jpg) chances of the issue occurring are greater. Doesn't seem to be related to any tool or specific process, at least not here,but rather more related to the actual screen drawing and panel updating from the looks of things.
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