Recently active topics in Twitter tagged with internal server error

User timeline is reporting a 200 status but the actual content is a 500.

here is the Header:

HTTP/1.1 200 OK Date: Wed, 01 Oct 2008 17:00:01 GMT Server: hi Content-Type: text/html; charset=UTF-8 Content-Length: 122 Set-Cookie: _twitter_sess=BAh7CDoJdXNlcjA6B2lkIiViNjdkOWJmZDBmZTlhZDZmMzk1MjQwMzRlOTMw%250ANmNlNiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo%250ASGFzaHsABjoKQHVzZWR7AA%253D%253D--def8ab0a8201fd9763404b20a5a6980f66aee89e; domain=.twitter.com; path=/ Cache-Control: max-age=300 Expires: Wed, 01 Oct 2008 17:05:01 GMT Vary: Accept-Encoding Connection: close Status: 500 Internal Server Error Content-Type: text/html

What's with the 500 Internal Server Errors? Random site weirdness depending on pages accessed. Twitter.com sometimes yields this error.

I'm unable to accept new followers. Every time I click the "accept" link, I get the following:

Status: 500 Internal Server Error Content-Type: text/html
500 Internal Server Error

I'm using Firefox 3.0.