Transformers Quality Problems

just a word on the transformers series... it seems that there have been some quality control issues at the Perth Mint - particularly on the Optimus Prime coin, but also on the others. There are small (required magnifications to see) white dots on the Obverse, which seem to be flaws on the polished surface - possible bubbles?

I was in a dealer yesterday and witnessed a gentleman return two sets and buy another three sets and out of five sets in total there were a large number that had this "flaw".

You may not care as it cannot be seen with the naked eye (how many people use magnification on coins in sealed capsules?) but if you do care, something to watch out for...