In case anyone else affected by this:

http://www.macrumors.com/2016/01/27/...ng-how-to-fix/

 

Don't worry, is not real, Jack will tell you.

 

Happened to me about an hour ago, both on my iPad and iPhone at the same time. I had to use the Puffin browser to search for a remedy after trying the obvious. Both are fine now where Safari is concerned but my 6S Plus is still with bugs where custom tones and the returning to default are concerned!