Keyboard shortcuts not working after removing Shutter
Open gconf-editor and change the following keys back to this:
/apps/metacity/keybinding_commands/command_screenshot => /usr/bin/gnome-screenshot
/apps/metacity/keybinding_commands/command_window_screenshot => /usr/bin/gnome-screenshot --window
If you don't have gconf-editor yet just install it from the software center.
- How do I use the gconf editor?
Go to System->Preferences->Keyboard Shortcuts and see if the entries for 'Take a screenshot' and 'Take a screenshot of a window' are present.
Also try
sudo apt-get remove --purge shutter
to remove any leftover configuration.