2.45b (2010-01-31)
* NEW: Explorer context menu entry now realised via dedicated shell extension.
* NEW: added field PRESENT keyword to filter for files that contain a specfic field in their tags.
* NEW: placeholder %_tool% for TAK now contains used TAK encoder version.
* NEW: support for reordering files via drag and drop at Tag Sources dialog.
* CHG: adjusted MP4 mediatype mappings to reflect changes in iTunes 9.
* CHG: COPYRIGHT field now maps to MP4 cprt atom.
* CHG: extended profile information displayed in %_vbr% for TAK files.
* CHG: file extension is now not selected when renaming files in file list.
* CHG: now displays technical information of the first audio track in MP4 (instead of the first track).
* CHG: SUBTITLE at MP4 now contains what previously was ITUNESPODCASTDESC which now contains the long description.
* CHG: Tag Sources selection dialog now remembers its selection state and sorting of search results.
* CHG: updated discogs web source.
* CHG: updated TAK decoder library tak_deco_lib.dll to TAK 2.0.0.
* CHG: user-defined fields are not truncated to 255 characters in MP4 anymore.
* FIX: menu 'Edit, Select all files' only worked if file list had focus.
* FIX: placeholder %_counter% was not available at action 'Export cover to file'.
* FIX: placeholder %_md5audio% now only available for audio formats tagged with ID3 and/or APE tags.
* FIX: removing files from filter result caused files that do not match the filter expression to be displayed.
* FIX: runtime error when sorting files after filtering with an invalid filter expression.
* FIX: sort indicator in file view was not reset if playlists were loaded or files were added.
* FIX: workaround for MP4 files with unconventional avcC atoms.
http://mp3tag.de/en/