Sorry for late reply. Didn't think I had to check this post again since the issue was fixed.
The link you provided gives the same problem I mentioned in the post I had made.
In F11 (fullscreen) mode when I move my char around using the arrow keys, the game screen moves along the arrows pressed. If I move up once or twice or x amount of times my screen will move along the number of times the key is pressed. This doesn't happen when I press WASD to move my char. But using WASD to move is hard to play since power keys (1-4) are right above the WASD.
No problems occur if I just click open the bookmark tab of the game. So the link you gave has the problems.
Hope this makes sense.
I know other players have had this same problem as me and it was fixed for them also the day you had replied back to my original post.