I'm using IE 8 and have been since it came out. I had no problems installing it at all after I got the connections straight with my system. All of my machines are running XP and it installed fine on all of them without a hitch.
I've also tried Firefox and Chrome finding them both very slow loading so have dumped them both with no want to use them again ever.
I don't know how it works with Vista as the only machine I got with Vista installed I removed it then put on XP Pro. Vista wouldn't run my Office XP Developer created program at all, which all of my business software is written in. That includes my electronic gate, security camera system (server computer for that) as well as my accounting software for running my business.
I just got a new computer (Vista) and the automatic updates keep reminding me to get IE8.. no thanks!Maybe THAT'S what it is. Works with Windows XP, but not with Windows Vista. When IE7 came out, there were some problems with THAT one as well. Now it seems ok.