Permissions

Konsole is started as normal user. In it is invoked the midnight-commander. Keyboard-navigation and -keypresses are flawlessly executed. The mouse-cursor moves if desired all over the screen. Clicking *outside* the console starts the envisaged action on other files, but *inside* the mc-konsole nothing happens at all when clicking. gpm, konsole and mc all 3 are [ root:root 100755 ]. When I however start the console, then su to root and invoke mc everything works properly! Where else should/could I look for the apparently missing user-permissions? Thanks.