The problem is:
When playing in the dungeon shield occasionly switches on. I can't switch it off pressing any keys or mouse buttons. Only invoking game menu helps (with mouse or escape key), but not for a long.
When I started playing several days ago I hadn't this problem. This began happening two days ago or maybe yesterday. I don't understand why just shield.. not running in any direction or fighting or shooting.. just shield sticks.. It's sad.
I play in Lunux using IcedTea & OpenJDK6.
OS - Ubuntu 11.04 Natty Narwhal x86.
Remapping keys not helping..
Cleaning cache and downloading game again not helping..
My Logitech Joystick while powered off somehow affected the game.
Pulling it out of USB port helped.
Sorry for disturbance!