* both encoder and decoder are significantly faster
* flac now has gzip-like command-line usage (should be more intuitive)
* the -# options have been tweaked for efficiency; -5 is the new default
* flac now autodetects WAVE input
* flac now ignores (with warning) unsupported WAVE subchunks
* new -o and --delete-input-file options
* new SEEKTABLE metadata block for storing seek points (speeds up seeking)