Finally sorted! - I found the crossed wire and fixed the Mutation = Killer Skull on the Attack Icon. Basically if a card was mutated it would get the killer icon under certain circumstances.
Also fixed the Attack Icon showing the correct ABILITY - e.g. poison / stun of cards like 'Rattie' and 'Stunned 'Mullet'
The HISTORY system is getting a ton of work over this weekend as well - which should not affect anything I've just fixed... yes... it should not... :P
Expect daily frequent patching and updates on Steam Beta branch with full patch on Sunday morning EST :D