Yeah, one of my staff members was having trouble with it so I just tried it myself. If you upload the pic then the thumbnail renders; import it from url and it doesn't (the pics are still in the user profile though).
I'm still having an issue trying to add a comment to an already uploaded picture, too. If I add the comment at the time of the pic upload, it works. Attempting it subsequently produces a board error.
This is a really cool script, man. Just hoping we can get these couple of bugs worked out before building on it a little more. This hack took an inordinate amount of time to install due to tracking down the lack of table prefixes in your files, so with all this effort invested I'm not gonna give up yet, hehe.