Leaving this as a reminder.
http://forum.industrial-craft.net/index.php?page=Thread&postID=174390#post174390

Btw, what does this method do?
https://github.com/xbony2/AFSU/blob/master/src/main/java/xbony2/afsu/blocks/AFSUBlock.java#L225

@xbony2 You should add the "Bug" label to this issue. Nice decompiling by the way. XD

Yeah :( I try to avoid that when possible, but sometimes it's necessary to get things working right.

@xbony2 I try to do the same too. That's why I make all of my classes from scratch.

It appears to get the tile entity and make sure it's not corrupted (refactoring may be needed).

Commit 03a25e2 should fix the cauldron error.