I see references made to snide comments... how is stating a opinion as such a snide comment? (No really, while I can see an Implication being drawn regarding the off-topic conversation as applying to the OP, mine, at least, were merely an observation; the people I discussed where otherwise smart people- friends even; I was merely making an observation about curious things that occured with them while they used a computer; something I personally attribute to being way to careful to not press the wrong button; a good quality to some extent, but not in the extent I witnessed!
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regarding any other forum being "better", well, that's just silly, and; as was said, an opinion; perhaps even a biased one. Now, certainly, they do the very same thing that is done here; but really? I doubt it's much different. Only one forum that I am a member of (Although, the total is only a handful) had issues that could be traced back to moderation (from what I could tell,TDWTF forums had a few issues a few years back... but I wasn't a member then by any means); and while there certainly have been stints here between specific members there certainly has never been any purposed ill-will towards visitors, at least that I've seen; unless of course they are spammers or known trolls; this is unlikely to be much different from any other forum.
Either way... I also recommend Firefox, or any other browser (except chrome), myself. However, switching the browser would only be the first step; they would still need to revert to IE7, something I had to do on my Vista machine. (my lyrics plugin for WinAmp displayed "page not displayed", and loads of issues with Compiled HTML files, which I use heavily; this is despite my main browser being Firefox. reverting to IE7 solved these issues.
Now, that being said, the original issue appeared to have been link redirection; as far as I am aware, upgrading to IE8 from IE7 wouldn't be enough to cause this sort of issue; and the download request by the browser indicates an unrecognized file type, something that might occur if a URL is redirected via the hosts file to another IP (possibly a trojan downloader IP) that automatically tries to send a malicious package.
Now, as stated before, these issues can be circumvented by using Firefox, but that's just tiptoeing around the problem; there is still an infection. While I must second the advice to use Firefox as a main browser myself, I must also reiterate that the original issue doesn't appear to be wholly caused merely by IE.