It might also be the compositor/WM causing leaks in Xorg. Certainly 'metacity' is second in your list, but it is meant to use a lot of memory because it has to keep copies of all windows. To check to see if it's the cause you would need to log into a different desktop environment that's not Flashback.
It might also be the compositor/WM causing leaks in Xorg. Certainly 'metacity' is second in your list, but it is meant to use a lot of memory because it has to keep copies of all windows. To check to see if it's the cause you would need to log into a different desktop environment that's not Flashback.