@khammerstein pointed out that if you visit http://en.m.wikipedia.beta.wmflabs.org/wiki/Special:MobileDiff/226666?mobileaction=beta
the diff and the fixed info panel at the bottom are not center aligned.
They should be.
Need a mock to show how it should look.
Note Baha's comments:
* I think the left and right paddings should be removed now that the content is aligned in the center: http://i.imgur.com/qQHRz6K.png