For some reason I can no longer post a comment as an Anonymous user in my Drupal installation. I haven't tried in a while, so I'm not quite sure when this functionality was broken.

I have Services installed, and I can post anonymous comments using comment.save. I have altered the Input Formats if that could break something.

I have enabled both post comments and access comments on the anonymous user. The comments does not show up in the database. In fact, the native Drupal function comment_save isn't called when I try to comment as Anonymous (I check this by adding print_r($edit);die(); at the top of the comment_save function in comment.module. Also I read something that not having a User with the UID 0 would break the Anonymous commenting, this user exists (obviously, since commenting through Services works)

I have tried out the AntiSpam module, and posted a comment as Anonymous that would get caught(and did) in the spamfilter, but this module is now disabled.

I'm really running out of ideas here, does anyone have any other suggestions on what to do? In the meanwhile I'm going to attempt to backtrack the code to figure out why comment_save() isn't being called.

Edit: Anonymous users also don't have to submit email and such to post, if that matters in any way.