I'm seriously annoyed to find so few players actually bother to decode album art in Ogg Vorbis files, but I finally DID find one...

Nightingale (fork from "Songbird" which dropped Linux) actually decodes and displays album art from hpr1103 corrrectly.  Hooray!

ZVUE 250 (hardware mp3/ogg/"divx" player from 2006) - plays hpr1103 fine but shows no metadata.

pokey: I'm not sure if the exchange would be all that interesting to listen to - right now we have several hours to a day or more to consider between replies! I should, however, be including some background on metadata in general in the next episode I do (which should be about geotagging) and in audio files specifically when I get around to doing the followup episode to HPR1103 (probably shortly after the geotagging episode and a shorter/low-priority btrfs one).

(Also even more about metadata, probably, if I ever get around to doing the topic I'm currently thinking about after those...)