Catch Evolution not scrolling in Safari

Hello, My website thechurning.net has suddenly stopped scrolling in Safari. It still works fine in Chrome. I have reverted a new plugin and reverse a change I made to a text widget but that has not fixed the issue. I then googled for 2 hours and looked in your support archive but cannot find a solution. Can you please see & tell me why thechurning.net is not scrolling in Safari and tell me what I can to fix it? MANY THANKS, Finn