I have a problem where the mouse cursor offsets to the right by approximately 20 pixels. The desktop displays correctly otherwise. While the mouse cursor offsets to the right by ~20 pixels, the point where X/KDE or whatever _thinks_ the mouse cursor is remains aligned with the desktop. Consequently, clicking a mouse button (either) actually clicks a point on the desktop 20 pixels to the left of the cursor image. Thus, to minimise a window (for example), I have to move the cursor ~20 pixels to the right of the little minimise button, whereupon it highlights and I can click it.
Even more strange is that this behaviour only surfaces occasionally. It is always (so far) normal when I have just booted into KDE, but suddenly, without warning or any other effect, offsets the cursor.
I cannot find any pattern to this behaviour - it happens only occasionally, it doesn't seem to happen after a fixed amount of time, nor does it seem to be caused by any particular application, or any other stimulus.
Lastly, the behaviour doesn't go away by itself - I have to reboot (not just logout and back in) to reset it to normal behaviour.
I am running RH Linux 7.2 (kernel 2.4.7-10) with KDE 2.2-11.
I hope this is clear enough, if you need more information or clarification, please say so (and how to find that information, e.g. version numbers - I'm still a newbie with Linux).