FLAC 1.0.4 released There are a lot of improvements since 1.0.3; let's get right to it:
flac:
Improved option parser (now uses getopt).
AIFF input support (thanks to Brady Patterson).
Small decoder speedup.
--sector-align now supported for raw input files.
New -T, --tag options for adding Vorbis comments while encoding.
New --serial-number option for use with --ogg.
Automatically writes vendor string in Vorbis comments.
Drastically reduced memory requirements.
Fixed bug where extra fmt/data chunks that were supposed to be skipped were not getting skipped.
Fixed bug in granulepos setting for Ogg FLAC streams.
Fixed memory leak when encoding multiple files with -V.
more..
http://flac.sourceforge.net/