I hope back > preferences > core updator > bleeding edge ... latest version with "ignore community themes | no" selected does the trick for you.
If not...
[HACK DELETED AFTER THE REPLY BELOW, BECAUSE IT IS UNLIKELY TO HELP ANYONE NOW. It was for people who find something like "float:right 9000px" in their CSS inspector and suggested using back > preferences > custom code to copy and use auto instead of 9000px ]
