[minor BUG] zombies lying around

I entered the mud flats with three zombies summoned.
As you can see on this picture: http://imm.io/K2mF only one of them is standing the other two are lying on the floor and look like their dead. However as you can see the counter is still 3.

Recasting Raise Zombie destroyed them and gave me working zombies so this bug is not serious.

[NOTE: for some reason the image-tag doesn't work with this url, I only get the text "K2mF"]