User blog comment:Rappy 4187/Technical Update: November 20, 2012/@comment-26686429-20121123131058

Wall remove history on RC is showing up as if it were an internal wikilink, but parsed as if it were an external wikilink.

So if thread:100 named "foo bar" were removed from a wall, the log would link to Thread:100|Foo, and the text display would be "bar"