I just sent email to support as well, bt might get a quicker answer here.

I recently upgraded Mezzmo to 2.6.2.0.

Nothing else changed in my network or my audio equipment.

I can no longer play any ALAC or FLAC files, which before the upgrade played perfectly as LPCM 1.4Mbps

The error message reads the file is corrupt or an unsupported format.

This is running on a Win7 PC with Corei7 cpu and 6 GB ram, feeding via wireless N to my Sony BDP-S570, profile BDP (NTSC, no DIVX).

Any comment/feedback welcome.