An evolution bug that is not caused by neonDragon, but by his assistant cow.
It can be easily identified, as is usually due to complete ineptitude rather than a dodgy fix.
There is/are a cowbug(s) in the system
An extremley rare thing, caused through influence of incompetent coders, such as The Mysterious X.
I've never seen a CowBug(tm) which wasn't caused by shamelessly copying code from TMX!