';' is missing at the ends of lines.
$ desktop-file-validate shutter.desktop
shutter.desktop: error: value "Redo;Select;Screen;Window;Active" for string list key "Actions" in group "Desktop Entry" does not have a semicolon (';') as trailing character
shutter.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Redo" does not have a semicolon (';') as trailing character
shutter.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Select" does not have a semicolon (';') as trailing character
shutter.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Screen" does not have a semicolon (';') as trailing character
shutter.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Window" does not have a semicolon (';') as trailing character
shutter.desktop: error: value "Unity" for string list key "OnlyShowIn" in group "Desktop Action Active" does not have a semicolon (';') as trailing character
shutter.desktop: error: action group "Desktop Action Redo" exists, but there is no matching action "Redo"
shutter.desktop: error: action group "Desktop Action Select" exists, but there is no matching action "Select"
shutter.desktop: error: action group "Desktop Action Screen" exists, but there is no matching action "Screen"
shutter.desktop: error: action group "Desktop Action Window" exists, but there is no matching action "Window"
shutter.desktop: error: action group "Desktop Action Active" exists, but there is no matching action "Active"
Fixed. Thanks.