Currently, the mime type for xbel files is <mime-type type="application/xbell"> (notice the two 'l' at the end) It should either be application/xbel or application /x-xbel (I dunno which one of the two though :(
The only place where application/xbel is used seem to be gnome-mime-data. klibs are using application/x-xbel. From gnome-mime-data changelog: 2002-05-28 Ricardo Fernández Pascual <ric@users.sourceforge.net> * gnome-vfs-mime-magic * gnome-vfs.keys.in * gnome-vfs.mime: Added entries for xbel, netscape and mozilla bookmarks formats. (Modified by Bastien Nocera <hadess@hadess.net>, we should use x- prefixes for non IANA mime-types) Bastien corrected netscape/mozilla types but not xbel, I couldnt find any trace of in the IANA mime list though.
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