I changed my wallpaper about a week ago to the one supplied with the Illuminate Window Blinds 5 theme by Code2.
The middle of the top part of the wallpaper(where it is brightest) seems to be flickering. I have never had this problem with any wallpaper before. I know that it is definitely not the wallpaper that is causing this, it was probably there all the while but it seems to have made this flickering noticeable. I tried changing the refresh rate in the ATI Catalyst drivers from 60hz to 75hz and this seems to fix to the problem.
You probably can't see it in the image but apart from the gradient extending from the top middle there are also many closely spaced diagonal lines running at a 45 degree angle downwards from the top.
I am interested in why the patterns in this wallpaper seem to make the refresh of the on screen image obvious to me because I haven't noticed them before. Also, I would like to know if a higher refresh rate puts extra load on the graphic card. Can anybody clarify this?