Lukáš, who's taken over TagLib maintainership these days, has just released the latest bug fix release for TagLib, also posted in his blog:

Changes from 1.6.1 are:

• Read Vorbis Comments from the first FLAC metadata block, if there are
  multipe ones.
• Fixed a memory leak in FileRef's OGA format detection.
• Fixed compilation with the Sun Studio compiler.
• Handle WM/TrackNumber attributes with DWORD content in WMA files.
• More strict check if something is a valid MP4 file.
• Correctly save MP4 int-pair atoms with flags set to 0.
• Fixed compilation of the test runner on Windows.
• Store ASF attributes larger than 64k in the metadata library object.
• Ignore trailing non-data atoms when parsing MP4 covr atoms.
• Don't upgrade ID3v2.2 frame TDA to TDRC.

As a side-note, some of my buddies from RethinkDB have been looking hard for good C++ folks out in Silicon Valley doing a MySQL backend for solid state devices. If you're a systems-y C++ wonk in search of a job at a hacker-friendly company, they're good folks. If you're interested and we know each other drop me a line and I'll do a little intro show-and-dance.