The helvetica scalable fonts (perhaps others) were removed from the urw-fonts package. This can make displaying larger than 24 point size helvetica fonts very ugly.
I noticed something else funny to do with this. The default xfs config file had a pointer to /usr/share/fonts/default/TrueType, which didn't exist. I searched all the packages on the CD to see if I was just missing a package, but none of them contained any files that would have been placed in that directory. Oh well, for now I'll stick to the RH 6.1 TrueType fonts.
Sorry, I meant the RH 6.1 Type1 fonts of course.
the fonts were renamed in 6.2 to have the official URW font names. This change has been reverted for our next release for better compatibility. New pkg urw-fonts-2.0-8 available in rawhide soon.