I'm giving this a try, since I have my old P4 machine with Windows 98 on it setup, and I've found this forum to work quite nicely on both Opera 12.02 and @roytam1's special Firefox 3.6 build, particularly if I switch the forum theme from "Switch (Default)" to "IPS Default."
"Switch (Default)" is usable, but kinda glitchy with the odd layout issues that people here have reported, whereas "IPS Default" renders almost perfectly (although the reply box is broken on Firefox).
I tried logging onto eBay.com, which mostly works, but the sign in page is broken, and I can't log on (no loss there, as it probably isn't the wisest thing to do anyway).
The main annoyance is that there are random errors in the encryption where a page will not load due to an encryption error, but will load fine if I remove "https://" from the beginning of the URL. But it can't be a hard error (like a missing cipher or some such), because it only happens sometimes. KernelEx-related, maybe? (I'm running straight 4.5.2, if that matters).
I wish I could make the forum render somewhat properly on Retrozilla, as I definitely prefer its lightness, and the fact that it's natively Win9x compatible, so no need for KernelEx. Maybe in time, as Retrozilla gets improved, this will be less of a problem.
c