Due to the massive increase in traffic we've been seeing, we have had to make tonnes of changes to the way things work on the backend to survive it all. Sometimes the bugs you're seeing are because of these changes, and sometimes its simply because the servers are getting hammered by the entire world taking interest in what we're doing.
The team has been working diligently to keep up with it, and will continue to do so through these times. We've discovered a lot of what is causing it, but there may be the occasional thing that happens here and there. Please report any bugs you see here in SD.