This is probably one to take upstream, but the "cvt(1)" utility isn't mentioned on the xorg.conf manpage; probably should be in the section on ModeLine, and in the "SEE ALSO" section. Version-Release number of selected component (if applicable): xorg-x11-server-Xorg-1.1.1-48.13.el5 FWIW, but one to take upstream
Fixed in upstream git. Thanks!