At least Documentation, and probably many other parts of the RH web site are using images in GIF format. This is a bad idea for both legal (you didn't *really* pay the stupid Unisys licensing fee, did you? ;-) and technical reasons. For example, <http://www.redhat.com/docs/manuals/linux/RHL-7.2-Manual/install-guide/s1-guimode-choose-lang.html> loads the image <http://www.redhat.com/docs/manuals/linux/RHL-7.2-Manual/install-guide/figs/guimode/lang.gif> Please see <http://www.gnu.org/philosophy/gif.html> if you have further questions.
The documentation department is aware of the reasons to not use GIFs. We plan to start using PNGs with the next release of our Red Hat Linux and Red Hat Network documentation now that there is better Web browser support for PNGs.