I have a problem with how my pages look. I am using the latest graphene theme.
When I am using 2 columns (1 sidebar on the right) IF and only if the main column is longer (because of two much content) than the right sidebar then the copyright black footer moves from the bottom of the page and goes straight under the right sidebar looking like an out of place black box.
The problem goes away in pages where the right sidebar has height that is greater than the main content on the left main column.
Have a look at my site to see what I mean. Try the "home page" for an example of the problem (scroll to the bottom) and the "about page" for an example of how the theme should look.