Steps to reproduce the bug (Linux 64 bits - xubunto 14.04):

Start a new game
Walk to to right until moving to another zone
You have entered a zone/house with 2 enemies
Walk left
The message "You cannot exit the game while in combat" appears
The player disappears like he was exiting the zone, the screen becomes darker and after a while the music stops
But the player has not exited the zone and cannot walk right to fight back

You must press ESC and then SPACE to return to the menu.