Comment 3 for bug 289592

Here is the problem:

# update-mime-database /usr/share/mime
[...]
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'

It seems to come from this file:
  /usr/share/mime/packages/kde.xml