I installed the Firefly app on the latest beta.
In Itunes, the flac files appear, but the only info about them is the file name. Also, they are listed as lasting 10 minutes each.
Obviously, there is something wrong with flac files.
If i go in firefly config web interface (or config file in: /Volume_1/Nas_Prog/iTunes/etc/), I see that flac files (which I added by hand in the extensions parameter) should be transcoded to wav, because flac extension is enabled in the ssc_codectypes parameter (I didn't enabled it myself, it was already) and there is also a transcoding script listed for that.
At that page http://forums.dlink.com/index.php?topic=5485.0 it lists flac support, is it really added ?