There seams to be a error when sorting strings in minidlna. If you have some directory's named whit the first letter upper-case and others whit lower-case.Then directorys is listed from A to Z, thereafter a to z. I guess this is wrong.
I guess upper-case and lowe-case should be treated similar when sorting text?
eksample if you make directorys as follow:
minidlna will sort them like this:
This sorting issue apply for directory browsing and artist name for sure, I haven't tested the other sort options, but i guess the same issue apply for al sort options in Minidlna.