Well, I recently upgraded from CD, at christmas, but am now having some troubles. When I plug my mp3 player into the USB, it connects, and after it's fully connected and such, I'll go into Computer->Opal->Internal Storage, and it stalls while loading in explorer at this point. This didn't happen the first couple times I plugged it in, so I have music on it, and it still works fine when not connected to my computer.
I am running Windows Vista, and the MP3 Player is the RCA 2GB Opal. If you need any additional info, I'd be glad to supply it.
Side note: I did go to the RCA website, and didn't find any help, although I'll be poking around again from time to time in hopes that I missed something.