I am having the oddest issue with Action Streams while trying to pull my twitter feed down.
Every time it tries to fetch the feed, it's throwing back a 500 error (Except if I delete and re-add it, then it works fine the first time). The error that's cropping up in the Activity Log is showing the 500 error, but then it's adding a space into my Twitter name so it shows like this: http://twitter.com/statuses/user_timeline/bri andump.atom
Anyone have any clue why it's adding a space in that random of a spot? Oh, and no I don't care if anyone has my twitter name, which is why I didn't block it out:)

The space is being added by MT so that your error message will wrap a little more gracefully. The spaces are added using the spacify modifier (FYI). The space has nothing to do with twitter.
I think Twitter is the source of your problem in this case. They have been have some difficulties recently. sniff