Do you have a 'default.list' in /usr/share/applications ?
Mine contains these lines :
Code: Select all
[Default Applications]
application/msword=defaultwordprocessor.desktop
application/notecase-enc=notecase.desktop
application/notecase-plain=notecase.desktop
application/pdf=epdfview.desktop
application/pet=petget.desktop
application/postscript=ghostview.desktop
application/rtf=defaultwordprocessor.desktop
application/vnd.ms-excel=defaultspreadsheet.desktop
application/vnd.rn-realmedia=defaultmediaplayer.desktop
application/x-abiword=defaultwordprocessor.desktop
application/x-bfe=Bcrypt-file-encryption.desktop
application/x-bzip=pupzip.desktop
application/x-bzip2=pupzip.desktop
application/x-bzip-compressed-tar=pupzip.desktop
application/x-cd-image=filemnt.desktop
application/x-chm=defaultchmviewer.desktop
application/x-compressed-tar=pupzip.desktop
application/x-deb=petget.desktop
application/x-delta=Xdelta-difference-manager.desktop
application/x-ext2-image=filemnt.desktop
application/x-ext3-image=filemnt.desktop
application/x-flash-video=defaultmediaplayer.desktop
application/x-gnumeric=defaultspreadsheet.desktop
application/x-gzip=pupzip.desktop
application/x-ogg=defaultmediaplayer.desktop
application/x-pkg=petget.desktop
application/x-rar=pupzip.desktop
application/x-rpm=pupzip.desktop
application/x-shockwave-flash=defaultmediaplayer.desktop
application/x-squashfs-image=filemnt.desktop
application/x-tar=pupzip.desktop
application/x-tgz=petget.desktop
application/x-xz=pupzip.desktop
application/x-xz-compressed-tar=pupzip.desktop
application/zip=pupzip.desktop
audio/basic=defaultaudioplayer.desktop
audio/mp4=defaultaudioplayer.desktop
audio/mpeg=defaultaudioplayer.desktop
audio/x-aiff=defaultaudioplayer.desktop
audio/x-flac=defaultaudioplayer.desktop
audio/x-matroska=defaultaudioplayer.desktop
audio/x-mp3=defaultaudioplayer.desktop
audio/x-ms-wma=defaultaudioplayer.desktop
audio/x-pn-realaudio=defaultaudioplayer.desktop
audio/x-ulaw=defaultaudioplayer.desktop
audio/x-vorbis+ogg=defaultaudioplayer.desktop
audio/x-wav=defaultaudioplayer.desktop
image/bmp=defaultimageviewer.desktop
image/gif=defaultimageviewer.desktop
image/jpeg=defaultimageviewer.desktop
image/png=defaultimageviewer.desktop
image/svg=defaultimageviewer.desktop
image/svg+xml=defaultimageviewer.desktop
image/tiff=defaultimageviewer.desktop
image/x-pixmap=defaultimageviewer.desktop
image/x-png=defaultimageviewer.desktop
image/x-xpixmap=defaultimageviewer.desktop
text/abiword=defaultwordprocessor.desktop
text/html=defaultbrowser.desktop
text/plain=defaulttexteditor.desktop
text/x-bacon=nicoedit-text-editor.desktop
text/x-c=defaulttexteditor.desktop
text/x-changelog=defaulttexteditor.desktop
text/x-genie=defaulttexteditor.desktop
text/x-log=defaulttexteditor.desktop
text/xml=defaulttexteditor.desktop
text/x-readme=defaulttexteditor.desktop
text/x-vala=defaulttexteditor.desktop
video/3gpp=defaultmediaplayer.desktop
video/asf=defaultmediaplayer.desktop
video/mp4=defaultmediaplayer.desktop
video/mpeg=defaultmediaplayer.desktop
video/quicktime=defaultmediaplayer.desktop
video/webm=defaultmediaplayer.desktop
video/x-flv=defaultmediaplayer.desktop
video/x-matroska=defaultmediaplayer.desktop
video/x-msvideo=defaultmediaplayer.desktop
video/x-ms-wmv=defaultmediaplayer.desktop
video/x-theora+ogg=defaultmediaplayer.desktop