Redmine

I'm using Redmine0.8.4 and I found some strange behavior at wiki pages.
When I tried to subscribe Atom for wiki pages, the feed items which listed are not only wiki's chengesets but also the target project's activities.

I can reproduce this problem just on this site.
For examples:
http://www.redmine.org/projects/redmine/activity.atom?show_wiki_pages=1

The response includes many issue items instead of wiki changesets.

I also have older version Redmine (0.7x) and this version does not have the same problem.
My report is not so seriouse problem but could you please handle this if you have a spare time?