Gentoo's Bugzilla –
Attachment 665068 Details for
Bug 748498media-gfx/krita-4.3.0: krita_jpeg.desktop: error: value "image/jpeg;jpeg/jfif" for key "MimeType" in group "Desktop Entry" contains value "jpeg/jfif" which is an invalid MIME type: "jpeg" is an unregistered media type