Strange behavior on 'right-click' on desktop

[noetus]

I am running a docked T52 with two external analog monitors on a PCI graphics card in the Dock (NVidia 6200 OC). When I use the mouse to 'right-click' anywhere on the open Desktop, the second monitor (UltraMon is installed) displays a sort of 'glitch', kind of like terrestial TVs used to do when reception is poor - horizontal lines scanning up the display with the picture sort of moving with them. In this case it's only for a second or so, and then the display returns to normal. If I do this repeatedly, after about ten of these little glitches, the monitor will go "CLICK" and go blank for a second, as if it's just received a signal to change display resolution or refresh rate (though it goes right back to the same display settings). This seems pretty weird to me. I think the video card is doing something funky. Any idea what is going on?

[Kyocera]

T52?

[noetus]

T52?

Ah no, that was a typo T42 !

[t-omen]

Just a thought, what type of (if any) backgraound do you have? Have you changed it lately and did the problem begin about then or is there no connection..?

I really do not know what the problem could be but on a few non-laptop-Windows there has been quite a few 'performance' problems when running something out-of-the-ordinary as a Desktop background (say, Flash presentation, for example)...