Photoshop CS4 strange problem

[Matix]

I'm using Windows 7 64-bit, and have tried both the 32-bit and 64-bit versions of Photoshop, both having the same exact issue.

Every aspect of Photoshop works fine, except strange behavior when using click-activated tools. That is, basically any tool that you click somewhere on the document to use. The problem is that it will pick a seemingly random point to click instead of the point where I clicked.

This is incredibly hard to explain. Let's say, for example, I was using the shape tool to draw a box. On occasion, it will draw a box whose dimensions are defined by where I click and how far I drag. This is how it SHOULD work. But most of the time, when I click to start drawing a box, it will use some random point as the starting point.

This problem is consistent with just about all the tools. That includes the paint brush, the eraser, gradients, selections, shapes, you name it.

[B]What I've tried:[/B]
-Use 32-bit Photoshop instead of 64-bit
-Disable Photoshop hardware acceleration
-Experiment with OpenGL settings in Photoshop
-Experiment with CPU usage and cache size settings in Photoshop
-Google
-Facepunch thread

[Agent766]

Is it [i]just[/i] PS? Could it be your mouse?

[KD007]

This could be lag, and until we find an actual fix, try hovering your mouse over the starting point for a second or more... before left clicking.