Thanks for the info, mf! I can almost certainly say that I know what the problem is (I think)! Did you try to log into your @projectego.net email account using your forum username/password? If so, this will be what's causing the problem.
In order to log into your personal email account, you'd need to use:
moonfever@projectego.net
And whatever password you chose (I can't check, sorry!)
Hope this helps! If not, lemme know and i'm sure we'll come up with something!
I'm not normally one to point the blame... but I can honestly say that this forum should not under any circumstances spit out an MSN login pop-up thingy. There isn't a single Microsoft-related ad network being used on this website (and I can promise Google AdSense isn't the culprit since they are Microsoft's competetors)
It is really strange that both you and DD are getting this error, though. Are you guys using the new Internet Explorer 8 Beta? I'm pretty sure that integrates all kind of Microsoft stuff such as MSN... and other stuff. I haven't had the problem, personally, and I use Internet Explorer 7 to debug the forums for errors.
It's really strange... I'll look further into this and see what I can come up with.
Do you guys gett his on the main site, too, or just the forums?