Problem with "background script"

[BrunoBrotto]

Hello! I'm having a problem with the background script. (I'm playing with EB 1.0 and the problem occurs in the first turn.)

When I activate that, using the "show me how" button, occurs a very strange bug, I will try to explain. When I move around the camera using the MOUSE, the game is normal, no lags in the campaing map and in the battle map, however, when I use the KEYBOARD to move arond, occurs a very slow lag, in the campaing map and also in the battle map... ( I already let the graphic in "very slow" to see if the problem is speed... but with certain the problem is a bug...)but this occurs only if I activate the Background script... please, help, I like this mod!
(Sorry for my English, I'm brazilian... )