Hello
first, thanks for the great theme.
I downloaded it a couple of days ago and then installed the Facebook plugin (http://wordpress.org/extend/plugins/facebook/).
The layout looks fine on a desktop but when it comes to mobile browser (HTC X One), the layout becomes scewed with the Facebook Comments/Login piushed to the right (image below).
http://imageshack.us/photo/my-images/641/20120816081550.png/
I realise this may not be a Graphene bug, but just in case, thought I should bring it to your attention.
[edit] – just found this: http://stackoverflow.com/questions/6500424/is-it-possible-to-set-a-fluid-width-for-facebooks-social-plugins
so this topic may still be of use to others who come across the same problem and perhaps someone might come up with the work around for the graphene theme.