$ desktop-file-validate xpdf.desktop xpdf.desktop: warning: key "Encoding" in group "Desktop Entry" is deprecated xpdf.desktop: warning: value "Application;Graphics;" for key "Categories" in group "Desktop Entry" contains a deprecated value "Application" xpdf.desktop: warning: boolean key "Terminal" in group "Desktop Entry" has value "0", which is deprecated: boolean values should be "false" or "true" xpdf.desktop: error: value "application/pdf" for string list key "MimeType" in group "Desktop Entry" does not have a semicolon (';') as trailing character
Fixed in rawhide (xpdf-3.04-5.fc22).