Does the Search box work in Forums?

Search doesn't seem to work in the Forums plugin. Whatever I enter, the results that come up are from Posts on that blog -- no forum content. And the Posts that come up seem to have no relation to the search term -- it's just displaying all the Posts

I have a Search widget in the sidebar ... could that be conflicting with the Forums search box?

Also, the URL for the search results page is a bit odd: it ends in "?search=" ... but the form is submitted via POST, not GET.