I haven't seen this anywhere, but if this has already been answered, please post a link to it.
Ok. Here's the problem: alot of times when I go to type in a name of someone like to PM them, instead of the drop down for the names, the whole message window goes white. Is it just my pc or what?
What version of IE are you using? I know people using IE7 have had that issue before. You will need to upgrade the version to 8 at least and it should work.
I had a simillar problem when I was useing IE7. On mine my whole screen went a random colour randomlly when typeing things while IE7 was running. It stoped when I upgraded to IE8, I don't trust Firefox.
I know a professional web programmer, he also says he hates IE. Not only does it make you significantly more likely to get a virus, but it isn't standards compliant with HTML.