Another Recommendations bug

I'd have posted this to the Collections-bug thread, but somehow I don't think this happened entirely because of collections. The bug in question is the appearance in Recommendations of books that shouldn't be there. For me, it's most dramatically illustrated in Member recommendations, where Pride and Prejudice didn't go away when I added it to "read but unowned". And now (see #2 and #3):

This piece of code is showing up on my recommendations page:

Warning: Missing argument 3 for memberrecommendations(), called in /var/www/html/ajax_memberrecommendations.php on line 8 and defined in /var/www/html/inc_work.php on line 2562

See example

Re # 2

Weirdest thing. It just disappeared. Did you just fix it immediately?!