Problem with custom tags since update to V2

[simoncn]

The iTunes Grouping field was previously written to the ID3v2.3 TIT1 frame. iTunes has changed this and now writes Grouping to the GRP1 frame instead.

MinimServer reads TIT1 and maps it to CONTENTGROUP. MinimServer does not currently read GRP1. Your sample file uses GRP1 (not TIT1) and this is why MinimServer isn't reading this information. This is the same for all versions of MinimServer.

For LANGUAGE and TEST, you need to add these to indexTags if you want to see them in the MinimServer index.