I tried to fill it @ 99%
=> works perectly!
All the information about the songs haves to be saved in the RAM memory of the iPod, I think the 5.5g iPod haves less RAM than the 7G.
Maybe if I manage to fill the iPod with 128kbps songs it will have difficulties, but I'm syncing everything @ lossless.
This means I can put a good 8000 songs in the iPod which shouldn't be a problem for the RAM, but 240GB @ 128kbps would be enormous.
FINALLY an advantage for audiophiles :P