Safari keeps loading pages one menu-bar width below top of screen--though menu bar is hidden.

Drives me nuts--I want that space. What's more, it does it inconsistently in a way I haven't figured out so far. Seems pages will load full screen, then later some windows, or sometimes *every* single window will be lowered. AND, to top it off, as it were, sometimes, but only sometimes, when I try to adjust windows, they refuse to be adjusted. They simply bounce back down from the top of the screen. Nyah nyah!!!

I know this is a relatively small beef, but between Tab Bar, Favorites Bar, Tool Bar, Menu Bar, it adds up to a lot of real estate on 13" screen. I try to keep as much space open as possible, and this is harshing my spacious mellow.

Any ideas, folks? Thanks for help.