For the last two months I have been getting an error whenever I try to Tweet a shortened URL from bit.ly: "There was a problem posting your request. Please try again." Not only that, but it won't even let me delete my Twitter account to see if I can re-add it to get the tweet from bit.ly feature back to working.
If anyone has any ideas why this is happening or what I can do to fix it, I'd appreciate it. I use Firefox 3 on Windows XP Pro.