Disappearing Images WTF?

[Viridis]

So I have both Photoshop CS2 and CS4 on my computer, but I generally work in CS2. I've had a problem occasionally where I do...something, I'm really not sure what, click off the image onto the grey background or something, and the image... disappears.

Just from view. It's still visible in the 'Layers' window and the History is still there. I can still act on the image, to save it and such, but it is not visible. It might be minimizing out of my view, but I can't seem to find it. The only "fix" I've found is to save the image, close Photoshop, and open it again, and then the image will appear.

This also happened when I minimized Photoshop; I clicked back and my image (which had been displayed normally) was just... not showing.

WTF. Anybody have ideas on what's going on here?

[bizarre]

could you post a screenshot of what happened? There's a million and three reasons why it could be doing that, so help us narrow that down, if you would.

[Viridis]

I don't have a screenshot at the moment, but the next time it happens, I'll post something up.

It's not a terrible problem, per se, since like I said I can still save the image, it's just very WTF.

[vardoburrito]

Does it happen in CS2? CS4? or both?
I'll take a stab and comment that it's CS4's graphic engine or their UI engine.
I trialled CS4 and I noticed some artifacts on the monitor, much like what ZBrush
creates because of some graphic card setting.

I can't imagine starting and stopping all the time.