by ABBDVD » 08 Jan 2015, 15:49
I don't really have experience with troubleshooting RPi / runeaudio but it might be useful to narrow down the problem if you could tell us where the mp3 and wma files are stored and how it's connected. In case it's not on a USB stick / hard drive, maybe try if there's the same issue with a USB stick.
(You might have wanted to create an own thread in the Rasperry Pi theme, but anyway...)