I have a problem with mp3's which i cant make any sense of. When i transfer my downloaded files onto the sd card, they all appear on the rns-e but originally only about 85% would play, it would skip past the others. I have tried different file names etc and dont think its that. Whats weird is i can then transfer the files to the sd card again, having made no changes to anything, and a different selection of files will now skip! Yesterday i tried to put the files on again as i had added a few new ones, and this time about 60% of the files wont play, which worked fine the last couple of times i put them on the card. The only thing i have noticed is that if i rip a cd onto my computer and then put that onto sd card, none of them skip. Also if i download an actual album from the internet in a zip file or something, that doesnt skip either. Any ideas? Im thinking of burning everythign to cd and then ripping it back onto my laptop, but there must be an easier way.