Website completely broke after upgrade

I got it back by following steps:

1. I went to customize and made any small change and publish the website.. this got fix design.
2. About duplicate logo, I had to remove logo or text from header. It was showing both.. I choose one and it worked.

Now, I need to fix fonts.

@colormag, We appreciate your efforts on upgrading to latest tech but it sometime creates nightmare to us :). We always think that upgrade will never break anything as it was not for all previous updates.