Wikimedia Bugzilla is closed!

I recently had regression tests start failing on a wikipedia API call intended to return all of the member articles of a named category. The specific test is pointed at the Progressive_Conservative_Party_of_Canada_MPs category.

The exact query issued to the wikimedia servers is:

http://en.wikipedia.org/w/api.php?action=query&list=categorymembers&cmlimit=100&cmprop=title&format=xml&cmtitle=Category:Progressive_Conservative_Party_of_Canada_MPs

notice that the first category member returned is:
<cm ns="0" title="Agar Rodney Adamson"/>

The query-continue element is as follows:

<query-continue>
  <categorymembers cmcontinue="10048701"/>
</query-continue>

Issuing the next query:

http://en.wikipedia.org/w/api.php?action=query&list=categorymembers&cmlimit=100&cmprop=title&format=xml&cmtitle=Category:Progressive_Conservative_Party_of_Canada_MPs&cmcontinue=10048701

Notice that the first member returned is:
<cm ns="0" title="Agar Rodney Adamson"/>

A number of members are repeated as continue ids are followed. Additionally, a number of members that should appear are never returned. For example, the article http://en.wikipedia.org/wiki/Ross_Reid is a member of the Progressive_Conservative_Party_of_Canada_MPs category but is never returned by the API call.