I am just starting with Linux. I have noticed that though Gnome has a fixed menu (Gnome panel) at the top of the screen, similarly to Mac OS X, it is impossible to click a menu item after moving the mouse all the way up, to the very edge of the screen. It looks as if there is a one pixel border between the menu and the screen top edge. Is it possible to remove it?
Resolved. The problem (or, rather, the reason) was that I had enabled Windows 7-like window maximize feature (maximize window by dragging it to the top of the screen), as explained here. Having switched it off, I can now use the Gnome menu with the mouse all the way up and left.