$ lintian cool-retro-term_*.deb | egrep desktop
I: cool-retro-term: desktop-entry-lacks-keywords-entry usr/share/applications/cool-retro-term.desktop
W: cool-retro-term: desktop-mime-but-no-exec-code usr/share/applications/cool-retro-term.desktop
$ desktop-file-validate cool-retro-term.desktop
cool-retro-term.desktop: hint: value "Qt;System;Utility;TerminalEmulator;" for key "Categories" in group "Desktop Entry" contains more than one main category; application might appear more than once in the application menu
