(first discovered on SO)
There seems to be a problem with title management on SE sites:
In fact, the title displayed when visiting the Unanswered page on a SE site is "Highest Votes Questions", instead of "Unanswered Questions". The problem is also here for the Unanswered (my tags) and Unanswered with custom tag (ex on SO with "css") pages.
If you visit any other "filter" page there is no problem; i.e. the correct title is displayed.