I don't know Bugzilla, so I have no opinion about adopting it, but I just wanted to point out that our sourceforge account at http://sourceforge.net/projects/wikipedia appears to come with a fairly sophisticated bug tracking system; maybe we should start importing bugs from the wiki page. (I also think that we shouldn't force Wikipedians to use a different interface to report bugs, quickly editing a Bug_Reports page seems to be the most natural for them).

Axel