I have RB on my e280 and it worked great until I recently fired the unit up again to try it (I bricked my Fuze). It won't play any of the tracks that are aboard; each title shows up with an ERR preface.
Using the org OS, I was able to switch to MTP USB mode and connect it to my PC. The tracks work fine in WMP, so they themselves are not corrupt. I can also listen to them through the org. OS, untethered from the PC.
Why is RB not recognizing them all of a sudden?