The recent queries view in the data explorer seems to be broken. It shows, since quite a while, that Mark Hurd asked for Quick Answers, zero seconds ago. The view doesn't seem to be updated by new queries.
Edit: Actually, if you save a query, it seems to be inserted in the list, but only after the top two lines. The "Quick Answers" always stay at top, with "0s ago". If you click the link to the query you also get a server error.
Edit 2: The problem with recent queries seems to be fixed now. One of the problematic queries was this, which still gives a server runtime error if called directly.