Client screen size.

I've been getting a problem with the client screen size. I usually have it in 1600 x 900. But every time I come out of a game it changes to 1280 x 720, then when I try changing it back, the frame stays at 1280 x 720 but the screen will go to 1600 x 900 and everything is just zoomed and I can't do anything so I have to reset the client...has this been happening to anyone else?? [zombie-brand-clap]