I've recently purchased a Denon 3808 AVR (very nice), but have had trouble serving flac files from mediatomb on my Popcorn Hour A110 (PCH). Everything looks good until I attempt to play a file then the 3808 gives me a "File Format Error".

Anyway, someone on a forum pointed out that it works on his Denon (not a 3808) if he adds the follow lines to his mediatomb's config.xml (I added them immediately after the opening <server> tag):

That first line looks very specific to the installation of mediatomb on the PCH, and I expect in most cases wont be needed or will need to be changed (note the lack of leading / on the path)...

The next thing is to ensure that transcoding is disabled for flac.. (again found in the config.xml file).

On my setup the config.xml file was found in /share/Apps/mediatomb/config/config.xml

This didn't make any difference until I killed mediatomb, deleted its mediatomb.db file (destroying its current database), re-starting it and re-importing my media files (flac)..

Now they all work just as I'd expect.