MIME type complaints when upgrading mintinstall

When doing a dist-upgrade this morning from LMDE/testing I got errors when mintinstall was being upgraded:

Setting up mintinstall (7.3.9) ...
Error in file "/usr/share/applications/ggl-qt.desktop": "app/gg" is an invalid MIME type ("app" is an unregistered media type)
Warning in file "/usr/share/applications/caja-folder-handler.desktop": usage of MIME type "x-directory/mate-default-handler" is discouraged ("x-directory" is an old media type that should be replaced with a modern equivalent)
Warning in file "/usr/share/applications/caja-folder-handler.desktop": usage of MIME type "x-directory/normal" is discouraged ("x-directory" is an old media type that should be replaced with a modern equivalent)

I'm running LMDE 32-bit with KDE bolted on top from Debian testing and qt-kde/debian experimental. The complete output of the upgrade portion of my sudo update && sudo dist-upgrade is:

The following packages will be upgraded:
  mintinstall mintmenu mintsystem usb-imagewriter
4 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 441 kB of archives.
After this operation, 531 kB disk space will be freed.
Do you want to continue [Y/n]? y
Get:1 http://packages.linuxmint.com/ debian/incoming mintinstall all 7.3.9 [203 kB]
Get:2 http://packages.linuxmint.com/ debian/incoming mintmenu all 5.3.7 [138 kB]
Get:3 http://packages.linuxmint.com/ debian/incoming mintsystem all 7.8.1 [22.2 kB]
Get:4 http://packages.linuxmint.com/ debian/upstream usb-imagewriter all 0.1.3-1linuxmint2 [77.2 kB]
Fetched 441 kB in 5s (85.5 kB/s)
Reading changelogs... Done
(Reading database ... 249490 files and directories currently installed.)
Preparing to replace mintinstall 7.3.3 (using .../mintinstall_7.3.9_all.deb) ...
Unpacking replacement mintinstall ...
Preparing to replace mintmenu 5.3.2 (using .../mintmenu_5.3.7_all.deb) ...
Unpacking replacement mintmenu ...
Preparing to replace mintsystem 7.8.0 (using .../mintsystem_7.8.1_all.deb) ...
update-rc.d: using dependency based boot sequencing
Unpacking replacement mintsystem ...
Preparing to replace usb-imagewriter 0.1.3-1linuxmint1 (using .../usb-imagewriter_0.1.3-1linuxmint2_all.deb) ...
Unpacking replacement usb-imagewriter ...
Processing triggers for shared-mime-info ...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Unknown media type in type 'uri/mms'
Unknown media type in type 'uri/mmst'
Unknown media type in type 'uri/mmsu'
Unknown media type in type 'uri/pnm'
Unknown media type in type 'uri/rtspt'
Unknown media type in type 'uri/rtspu'
Processing triggers for desktop-file-utils ...
Processing triggers for gnome-menus ...
Processing triggers for hicolor-icon-theme ...
Processing triggers for man-db ...
Setting up mintinstall (7.3.9) ...
Error in file "/usr/share/applications/ggl-qt.desktop": "app/gg" is an invalid MIME type ("app" is an unregistered media type)
Warning in file "/usr/share/applications/caja-folder-handler.desktop": usage of MIME type "x-directory/mate-default-handler" is discouraged ("x-directory" is an old media type that should be replaced with a modern equivalent)
Warning in file "/usr/share/applications/caja-folder-handler.desktop": usage of MIME type "x-directory/normal" is discouraged ("x-directory" is an old media type that should be replaced with a modern equivalent)
Setting up mintmenu (5.3.7) ...
Setting up mintsystem (7.8.1) ...
update-rc.d: using dependency based boot sequencing
Setting up usb-imagewriter (0.1.3-1linuxmint2) ...
:~$