Dear Gary,
Back from my holidays today....strange one this, please if you can be bothered send us some exposed and unexposed sheets and the batch number ( its on the wrap around label ) in return if you pm me your address I will arrange replacement of the product ASAP.
You all know our QC methods I guess, it is incredibly rare for any defective product to leave the factory, FYI last month ( July ) we had 17 complaints received at the factory ( from Worldwide ) of which 6 were 'cause not certain' or 'cause justified' and replaced.
Anyway, lets have a look at it and I will post the result...as it is unusual
Regards
Simon ILFORD Photo / HARMAN technology