This is not an error in the EMFF, but an error in the function loadSound() of the Flash Player. Some MP3 files dependent on the bitrate force the Flash Player to produce this error.
The bug already has been sent to Macromedia and will be repaired in one of the future versions of the Flash Player, but until then there is a small workaround:
Just encode the same music file with different encoders and in different bitrates - usually you should find the right file in a short time!
After many requests for this function I decided to include it to the EMFF!
The main code of the EMFF will support this and more functions in the future. Each skin can "decide" which functions it will support. At the moment the EMFF supports multiple MP3s (without playlist), repeat mode and volume controls.
The EMFF uses the function loadSound() of the Flash Plugin to load and play music files, and this function does only support MP3 files (in the moment).
Lets see, something like a playlist would be pretty nice... ;-)
EMFF is an acronym for "Easy Musicplayer For Flash". That's why my answer is: I couldn't think of any other name, because that's exactly what it is. An easy, small and fast loaded musicplayer, based on Flash and especially for websites. No other title could describe these facts in such a short way... ;-)