zoom problem

greetings

I am using the new beta version 10.4.4 of bricscad and I have a little problem

I use a lot the middle button or wheel of the mouse, and sometimes the zoom with this button is slow and the screen show differents size zoom of the same image at the same time, I don't know if this problem is a driver problem of my cumputer or not, I should say this problem only appears with this zoom mode (with the wheel), with the options in the program (zoom toolbars buttons) I don't have problem.

I am using an Intel desktop motherboard with its video card integrated and my linux version is ubuntu 9.10 and after to detect this bug I installed the drivers for my motherboard for ubuntu and the problem continue.

somebody has any idea about of this problem?

thanks a lot