After updating to X11R7, the X cursor is being displayed about 20 pixels right of where it should be. Clicking the mouse button, and letting the mouse hover over things, takes effect about 20 pixels left of the displayed mouse pointer. Adding 'Option "HWCursor" "off"' to the configuration makes it work.
This was X11R7 RC2 or so I believe, given the timeframe.. Please update to the latest internal rawhide packages (or wait until Saturday and update from public rawhide) and see if things are fixed now. Be sure to confirm that the 'mga' driver is in the xorg.conf, as previously kudzu would have used the 'vesa' driver in test1/test2. Does this resolve the problem?
ping
/me tries to remember where all the components are which were in the offending computer at the time.... I definitely need to put it back together and do some FC5test installs...
Probably best to file this in Xorg bugzilla if it's still happening in rawhide.
There isn't enough information present in this report as-is to investigate, and it's probably not a Fedora specific issue per se. If this is still a problem in current rawhide, please file a report in Xorg bugzilla and we'll track it there.