My friend has a G1 & GH2, at the weekend we attempted to update her 100-300 & 45-200 lens but it came up that it was not needed? even though they had not been done. Now i know the G1 firmware has not been updated (the lenses were on this) would this be the reason? As it says that generic batterys wont work after update she is very wary about doing this as all bar one of her batterys are generic and replacing them with pany ones is not an option re cost. So the question is will generic work after update on either or both cameras.