Take a look at
http://www.zenphoto.org/trac/timeline for 2/9/08. The user "sdsfsf" has spammed a helluva lot of pages. I've cleaned up several, but I don't have the time or patience to get them all myself. If a couple of other people would clean up a few it would speed things along. The spammer was kind enough to put everything at the beginning of the page between `{{{
#!html ... #!html
}}}`
Just delete everything between those delimiters and save the changes.
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