I have just found out that Bugzilla queries would not show any bugzilla bugs (even when there are Bugzilla bug reports that match the query). It was working fine this morning...
Hm, it does show this one (#62), but does not show any old ones (#41,#43,#45, etc). Is it possible that it has something to do with the fact that #62 says "Version: 2.1r" while #41, #43 and #45 say "Version: 2.1" (without r)?
yes, this was due to the version mismatch. it's been fixed in the database and noted for future updates.