Sorry for the cross post from BMCUser.
I don't know which adapter did it, but with the super tight BMC mount one of my adapters grated off 2 of my EF contacts. Luckily the iris and IS still work.
Some one on the BM forum suggested that it might be from a "chipped" adapter and I'm sure that is what has caused it. Time to get the chip off of them. A sticky has been added about this to the BMCUser Forum
