I didn't look past the first page of bug reports but I'm assuming its not on there since they date back to 2005.
I've encountered a bug that appears to be limited to CT... and this is on a progression server as well dont know if that makes a difference.
Random mobs in CT (Normally goos and raptors) will come back as a NULL Spawn.Type.
If you do ${Target.Type} while one is targeted you get NULL and if you try ${Target.Type.Equal[NULL]} instead of getting true or false you get NULL. (This is of course while a null target is targeted).
