The new xorg-server-1.1.1-r1 causes a big horizontal line to appear across the center of my screen during movies when there is movement on the screen. It looks like the top half of the screen is moving at a different rate than the bottom half so they aren't in sync. If I downgrade to 1.0.2-r7, the problem disapears. I'm using nvidia-drivers, I've tried the masked version of nvidia-drivers, and the problem is visible in mplayer, totem, and vlc.
Cannot reproduce the problem and we can't fix it anyway, so please report it upstream together with nvidia-bug-report log http://www.nvnews.net/vbulletin/forumdisplay.php?s=&forumid=14