ID3 tag type was the issue with Media Player 11

When I converted the id3 tags to v2.3 all the album art went to the correct format. Interesting issue that. By noting it here I hope that it will help someone else. iTunes has been great for this as it can convert between various tag types (from v1.1 through). I've shoved my collection to version 2.3 tags, and it seems to have solved the problem with the screwed up album art.
Let's see, a bulk change of many thousands of tracks should take all night.