When I use gnome-terminal the background is annoyingly slightly-transparent. Here you can read the ubuntu.stackexchange.com site through the background.
These are the background options I have, which are set to "not transparent".
I have the desktop visual effects set to "Normal". Changing them to None removes the problem, but obviously I lose out on visual effects like window previews, drop shadows, nicer transitions, etc. Any ideas how to make this background truly solid while keeping normal visual effects?