Clearly something basic has changed between 2009 & 7 with how 'album artist sort order' is handled?!
2009 vs 7, both running on MySQL via SQLEXPRESS with new databases created from within each version of Helium. Same music data imported. Music Explorer artist field sorted by > Album Artist and then Album.
Music Explorer in 2009 > album artists (ie "u-ziq [Gary Moscheles]") display correctly and include actual data.
http://img691.imageshack.us/i/2009f.gif/
Music Explorer in 7.7856 > same album artist (ie "u-ziq [Gary Moscheles]") now displays INcorrectly and does NOT include actual data.
http://img716.imageshack.us/i/91200778.gif/
The data does actually exist - if I change Music Explorer to sort by Artist (not Album Artist), "Gary Moscheles" displays with track info.
So why the big change and how to fix it?
Looking through the ID3 tags, now there seems to be HELIUM2 ALBUMARTIST, HELIUM ALBUM ARTIST SORT ORDER and in some cases ARTISTSORTORDER. Which is actually the correct to use now for the maximum compatibility?!
The actual ID3v2 Frame Specification (Version 2.4 - delta respect to 2.3) seems to be TSOP Performer sort order; are any of Helium's tag-frames actually mapping to this standard?!?
btw, in the above example, that album used ARTISTSORTORDER, which worked in 2009 and doesn't in 7 clearly.

