I just installed the latest ubuntu (7.04) and I have a problem with my
screen. The desktop for ubuntu does not use the whole monitor width - space
on the right side - and also the desktop goes too far on the bottom and I
cannot see the bottom of the screen.

I am able to use 1024 x 768 in Windows XP but I can only go to 800 x 600 in
ubuntu besides the centering issue.