Mac Pro, Leopard 10.5.2, Photoshop CS3, 8800GT and Dual Monitors - Crashing

Hi, I received my Mac Pro (with Nvidia 8800GT) earlier this week and set it up with my dual monitors. I soon discovered that Photoshop CS3 crashes when scrolling a 'zoomed in' image with dual monitors. Photoshop is setup so that all palettes are on the smaller samsung monitor and the main image window I'm working on is on the 23" cinema display.
I've updated both the OS and CS3 but cannot solve the problem unless I switch to a single view setup, ie, drag all the palettes over to the larger monitor so that photoshop is no longer dual monitor. Then it works fine. Although it's a workaround, it's not an ideal situation. Has anyone else found this to be an issue? Have you found a solution?
I've also re-installed Photoshop, visited a genius bar and changed mice!
Thanks, any help would be appreciated.
-N

My Mac Pro had been running 3 Dell monitors on two NVIDIA GeForce 7300 GT cards for months, and with the (I think) Safari update all of a sudden the Mac freezes, 1 monitor displays garbledy gook, and the other is blank with a blinking power light. That is, until yesterday when the power light refused to come on. So I says to myself, "Self, how about testing them on my iBook?" The 1704FPT will not power on, plugged in to a computer or not. The 1707FP shakes like crazy when starting up on the iBook, then settles in and seems to work. Meanwhile, the SP2008WFP is working alone on the Mac Pro, but not totally trouble-free. What the heck is going on?

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