http://webzoom.freewebs.com/xmuppetsb/ZC%20Content/Test%20Quests/bosstest.qst
The leftmost screen on Map 1 in this quest has a BS Patra. Kill just one eye, leave the screen and come back, and the BS Patra enemy just disappears altogether! This bug doesn't seem to happen with any of the 1x1 Patras, because if it's a 1x1, you have to kill all the eyes and the enemy itself in order for it to stay dead.
BS Patra Bug
Just to let you developers know, I first saw this bug when I was playing around with my test quest in RC1, and I can still see it in RC2.
Fixed......