Maybe. I think that's less likely than syntax error, for two reasons.

#1, if you look in index.php, there's a < on line 228 and a > on line 258, correctly rendered. Granted, the < is part of a <=, which weakens that argument.

#2, if you look at the surrounding code, $user > 0 makes logical sense given what the code is doing (and assuming 0 represents an invalid/nonexistent userid, which I believe it does given that facebook userids increase monotonically).