Anyone else seeing:
Warning: Call-time pass-by-reference has been deprecated; If you would like to pass it by reference, modify the declaration of [runtime function name](). If you would like to enable call-time pass-by-reference, you can set allow_call_time_pass_reference to true in your INI file. in /forums/bb-includes/classes.php on line 260
...after upgrading to 2.2? I can't figure out what's going on.