I just updated my Rockbox last week. it's on my 4G gray Ipod.
I used until now a custom build because of a bug with 4g.
It's now corrected, and working fine with last version.
I hate the way Ipod original firmware handle the playlist and/or the ID3 sorting (even more as I'm using Shift jis è_é).
I hate Itunes auto update feature and auto updating the local file.
I had to make tons and tons of playlist, all with short name, because of the Ipod limited screen and big letter's size.
that looked like
Final fantasy...... can't see which one
or Gensou suikoden.... can't see either
had to rename all to ff x, or suiko x
I'm happy I found Rockbox, I can now use folder base browsing, real HDD storage, and no more random renaming in random folder.
Yes, battery life is dramatically short, but I'm happy now. Happiness worth the battery life