@ mmike. “Song” means it will use the track gain values instead of the album gain values. You’d select “Song” normally only if playing mixes and playlists etc. Listening to albums with “Song” selected can give weird results - which is what I should get with my After Forever example. The fact I don’t get a weird result is what indicates an issue with the Fuze in that example.
@ justme - I’m not 100% sure what the ‘+’ bug is, but you could be on to something. For my After Forever example track 1 should have a track gain of +3.36 dB, whereas Track 2 should be (and is displayed on the Fuze as) -7.55 dB. So maybe this is the cause of my issues with the “Song” mode.
I still need to figure out what the issue is with the Fuze not recognising Replaygain in 90% of my albums when every other Replaygain aware device and software I’ve tried works fine.