It's comming up fine now on IE 7.0.5730.11 + FireFox 3.5.1 + Chrome 4.1.249.1045 all on XP Pro SP2 behind Zone-alarm with mobile code control off.

For development, you can see what browsers are in general use right now with this link: http://www.w3schools.com/browsers/browsers_stats.asp

Here is Evolt's browser archive for downloading older browser versions if you need any: http://browsers.evolt.org/