In version 0.5.1-1: If I use the command redhat-config-xfree86 --reconfig, it says that the file was written to XF86Config-4. /etc/X11/XF86Config-4 is written, but /etc/X11/XF86Config is not written. It should just write XF86Config, and the message should say the same.
Ouch. Indeed, that is a nasty one. We should never be writing out the XF86Config-4 file with the new tools IMHO.
Should be fixed in 0.5.2.
Fix confirmed with redhat-config-xfree86-0.6.0-1.