Mutagen

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* New Features:

* mid3v2 can now set URL frames. (Vladislav Naumov)
* Musepack: Skip ID3v2 tags. (Lukáš Lalinský)

* Bug Fixes:

* mid3iconv: Skip all timestamp frames. (Lukáš Lalinský)
* WavPack: More accurate length calculation. ('ak')
* PairedTextFrame: Fix typo in documentation. (Lukáš Lalinský)
* ID3: Fixed incorrect TDAT conversion. The format is DDMM, not
MMDD. (Lukáš Lalinský)

* API:

* Metadata no longer inherits from dict.
* Relatedly, the MRO has changed on several types.
* More documentation for MP4 atoms. (Lukáš Lalinský)
* Prefer MP3 for files with unknown extensions and ID3 tags.

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* Bug Fixes:

* Documentation mentions ASF support.
* APEv2 flags and valid keys are fixed.
* Tests pass on Python 2.3 again.

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* New Features:

* FLAC: Skip ID3 tags. Added option to delete them on save.
* EncodedTextSpec: Make private members more private.
* Corrupted Oggs generated by GStreamer (e.g. Sound Juicer) can be read.
* FileTypes have a .mime attribute which is a list of likely MIME types
for the file.
* ASF (WMA/WMV) support.

* Bug Fixes:

* ID3: Fixed reading of v2.3 tags with unsynchronized data.
* ID3: The data length indicator for compressed tags is written
as a synch-safe integer.

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* New Features:

* OptimFROG support.
* New mutagen.mp4 module with support for multiple data fields per atom
and more compatible tag saving implementation.
* Support for embedded pictures in FLAC files (new in FLAC 1.1.3).

* mutagen.m4a is deprecated in favor of mutagen.mp4.

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* New Features:

* MonkeysAudio support. (851, Lukáš Lalinský)
* APEv2 support on Python 2.5; see API-NOTES. (852)

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* Bug Fixes:

* Expose full ID3 tag size as .size. (848)

* New Features:

* Musepack Replay Gain data is available in SV7 files.