dba_afish said:
that blacklist bug's been fixed now.

It's a little more complicated than that.
The original issue – where the blacklist would fail on thumbnails in DText and avatars – that had been resolved yesterday.

However, there is a secondary bug that causes those same thumbnails to not be blacklisted properly if the thumbnail for that post is already present on the page.
For example, if you blacklist a specific post, and then a person with that post as an avatar comments on it, their avatar won't be blacklisted properly.

It's all wacky edge cases that didn't pop up in testing at all. I'm terribly sorry about all that.
Should be fixed in the next patch, which is currently scheduled for Friday.
Please, let me know if you encounter any further issues.