syntax error, unexpected '<' in /forumdisplay.php(833) eval'd line 1

[MTGDarkness]

Basically, I'm getting this weird new error on forumdisplay. It doesn't crash, it just floats above the forum...

Parse error: syntax error, unexpected '<' in <x>/forums/forumdisplay.php(833) : eval()'d code on line 1
http://forums.mtgdarkness.com/forumdisplay.php?f=127
I don't know where it came from (I didn't screw around with any templates recently), nor do I know how to fix it (it's been a while since I did any tech work on vBulletin). How do I deal with this?
Lines 830-835 in Forumdisplay is this:

		if($thread['sticky'] == "1" && !$donestickysep)
		{
			eval("\$threads .= \"".$templates->get("forumdisplay_sticky_sep")."\";");
			$shownormalsep = true;
			$donestickysep = true;
		}

Unfortunately I have no idea what to do about this. How do I debug this?