Ah, thanks Brion, very good news :-)
Minor bug in http://download.wikimedia.org/wikipedia/af/pages_full.xml.gz
About 1 in 20 edits is attributed to <ip> where <username> seems more appropriate:
<contributor><ip>John</ip><contributor>
Maybe it has been fixed already, I see lots of these in /af/, none in /nl/ .
Erik Zachte