Using Firefox on OS X. Also tried Chrome on OS X, same result.
I go to Courses and type a search term in the box at lower right, then click the search button.
Page reloads, with exactly the same courses as were showing before, none matching my search terms.
Oh! Thanks, that explains it, but that’s really buggy. Especially since I tried the same search with quotation marks around the phrase, “Hebrew from scratch”, and it did the same thing. Now I know how to work around it in some cases, though this workaround won’t apply to all searches. And it’ll certainly confuse people who don’t know about this and make them think search doesn’t work at all, so they won’t try it again (since most users aren’t on this forum).