I have a bunch of friends who blog on Xanga, and they’ve finally (not exactly sure when) started returning properly formatted RSS. Before they made the change, any time a user would put a character like a “?” in their blog post, my feed reader would blow up on the feed and for the next 10 posts I wouldn’t be able to read their content. Now it’s all good and I’m up to date with everybody who’s on Xanga.