wtf?

i'm not even going to talk about the fact that firefox lost my bookmarks again and for good this time.

now, i can't go to *.yahoo.com

i get: "Error
Invalid HTTP request."

It's not a hosts issue because I can get to it in IE. I'm pretty sure I didn't inadvertently block it but if i did, i can't find a way to unblock it.

Anyone seen this before?