penders - 5:15 pm on Dec 27, 2011 (gmt 0)
The problem is that it's displaying the container a little to the right...
Not to the left? The CSS you have posted does not appear to center the container at all, so I would expect it to appear hard left?
To center the container you would need to add margin: 0 auto; (or similar) in order to set the left/right margins to auto. This then appears centered for me.