Hey Kris,
I've noticed a little bug...wasn't sure if someone mentioned it already or if there was somewhere else to post it...
When you increase the paragraph indent it shifts headers <h1-6> to the right as well. This results in chapter titles etc. being off center unless you have paragraph indent set to zero.
<p>s and <div>s that are styled as "text-align:center" remain positioned properly in the center - it is only the <h1-6> tags that get moved.
This happens in portrait and landscape; 1,2 or auto columns.
Versions: Marvin 1.3, ipad2 iOS 6.1.3
I hope that helps!
Cheers,