Just pushed a fix that should make RSS feeds work properly (you will have to resubscribe to the RSS feeds, if you did so a while ago). Thanks to squirrelInHell who made me aware of the deeper problems with our RSS feed (that my RSS reader seemed to mostly automatically patch, but which other people ran into).
As I mentioned in a post that has now fallen off the end of meta: while RSS feeds work much better now, usernames still don't show up as the author in the feeds.
Ah, excellent. I didn't know there was a github.