Shortly after I changed the Screen Resolution in Fedora 8 something happened that robbed me of all my new pixels. The usable portion of my desktop and windows was greatly reduced. The phenomena reminded me of Windows Large Font mode. It can be fixed in System->Preferences->Look and Feel->Appearance. In the Appearance preference click on the Fonts tab; Details… and change the dots per inch (DPI) resolution. Mine got changed to 166. Not sure what the original value was but changed it to 96 and am much happier with the results.