After reading the posts regarding HTML Blocks not working correctly, I realized the HTML Block Editor in my Firefox V3 was stripped down. It seems Firefox works for some people, but not everyone. The solution for me was installing Firefox V2 to another directory so I can run either version. (Firefox2\firefox.exe" [space] -ProfileManager in the properties of the firefox desktop shortcut). http://www.command-tab.com/2008/06/18/how-to-run-firefox-2-and-3-simultaneously/
Firefox V3 didn't allow me to post on this forumn or expertezzz, and both sites ran at a slooooow speed.
So if your HTML editor is stripped down and doesn't show the font color, size, etc. Maybe try Firefox V2.
