If you're having a weird mouse grabbing problem in X on Fedora Core 5 (I get this when I'm using the Cisco VPN Client), you can try the following package:

xorg-x11-server-Xorg-1.0.1-9.fc5.5mouse.i386.rpm
xorg-x11-server-1.0.1-9.fc5.5mouse.src.rpm

Old releases:

xorg-x11-server-Xorg-1.0.1-9.fc5.1.1mouse.i386.rpm
xorg-x11-server-1.0.1-9.fc5.1.1mouse.src.rpm

The above are signed with my public key and are just a rebuild of the xorg rpm from Fedora + the patch described here:

https://bugs.freedesktop.org/show_bug.cgi?id=3113#c9
https://bugs.freedesktop.org/show_bug.cgi?id=5769
the patch

zing at fastmail dot fm