When I click on something to drag and drop (drag-n-drop) it e.g. in Nautilus, the window gains focus and is raised. If the destination of my drag (e.g. another nautilus window) is above the window it is lowered and obscured. This forces me to arrange my windows before starting a drag and drop so that my destination is still visible when the source window is raised. This could be fixed by windows not being raised until mouse release instead of mouse down. Ideally, though, there would be a special case where if drag and drop is initialized the window isn't raised until release, otherwise it is raised on click.

Currently you can only set Super by itself from the System -> Preferences -> Keyboard Shortcuts dialog. It is possible to set, but you have to start gconf-editor from the command line. In gconf-editor -> / -> apps -> metacity -> window_keybindings you have to manually type the combination, instead of pressing the desired key combination.

I'd like an easy way to set environment variables (both globally and for the current user only) and have them take effect without having to log out and back in.

If a Gnome panel with a background image is created / moved to the left or right side of the screen instead of the top or bottom, the panel's background image isn't rotated and looks tiled.