Situation: when browsing or in "now playing", press "right" when looking at a track... get a list of details about the track including artist/album/bit rate etc etc.  Genre is in this list.

Problem: if I have several "Genre" values associated with the track, only the first one appears in the list.  I am using multiple genre values with a ";" separator.  The multiple genres are working fine for browsing purposes, so I know they are being registered by slimserver.  I don't have the means to test if I'd get the same outcome if the original files had multiple separate "genre" tags, but I guess the result would be the same.

Solution: Either 
(1) Show a separate line in the listing for each Genre (preferred) or
(2) Reconstitute the original tag value and show all the values with the separator

Note: if we ever get as far as treating other tags like "performer"  (i.e. ones which are allowed to have multiple occurrences) properly, the same problem is going to occur there too.