Using the "Swiss pocket knife" JoyToKey, I configure one joy button to look in bombsight and manage to avoid this JU-88 bug, even if POV is not straight forward:
http://i50.tinypic.com/4fubf4.jpg
When press joystick button 5, JoyToKey send "Keypad5 (FOV forward) 2x, Shift, F1".
So I can pan around cockpit and look into bombsight without freeze.
Sokol1