ive had a logitech mx518 forever it seems. well the day came to get rid of it so i went with the new style g5 because its the same shape as my 518. the mouse works great when its working, but the mouse or driver crashes all the time. the mouse will drop down to 400dpi and gets stuck there. i have to unplug the mouse and plug it back in to get the dpi to change. i am using the drivers from their site. does this happen to anyone else?