For a test file, see http://bugsfiles.kde.org/attachment.cgi?id=85562 This file has a Theora video stream (theo), but no audio. Dolphin shows "Type: Ogg Audio" and "MIME Type: Ogg Audio", but if I go to Properties for the file, it tells me "MIME Type: application/ogg". ( Screenshot here: http://i.imgur.com/yx5bxs0.png ) Since this is a video file, one would expect it to show something like video/ogg (or maybe x-theora+ogg - I don't know enough about it). The inconsistent "application/ogg" isn't helpful either. Reproducible: Always KDE 4.11.5 on Ubuntu. (My apologies if this is filed under the wrong component.)
*** This bug has been marked as a duplicate of bug 324607 ***