The desktop file of audacity-1.3.2-r1 can't be parsed by "update-desktop-database" (from desktop-file-utils-0.12). The command outputs the following error message: Could not parse file '/usr/share/applications/audacity.desktop': Key file contains line '?[Desktop Entry]' which is not a key-value pair, group, or comment
$ hexdump -C /usr/share/applications/audacity.desktop | head -3 00000000 ef bb bf 5b 44 65 73 6b 74 6f 70 20 45 6e 74 72 |[Desktop Entr| 00000010 79 5d 0a 45 6e 63 6f 64 69 6e 67 3d 55 54 46 2d |y].Encoding=UTF-| 00000020 38 0a 0a 4e 61 6d 65 3d 41 75 64 61 63 69 74 79 |8..Name=Audacity| The file starts with "ef bb bf" ("zero width no-break space" in UTF-8). If I remove these 3 bytes, then there is no more error message.
*** This bug has been marked as a duplicate of bug 169866 ***