Jetpack Sharing Buttons

Hi,
Just started using Jetpack with a brand new WordPress Blog and am trying to implement the Sharing Buttons.

The buttons display fine but when clicked just reload the current page in a new window. There’s not much to debug so i’m a little lost.

Had a Google about and tried the following fixes without success – behavior persists:
Disabled all other plugins.
Checked my theme, (twenty fourteen), wasn’t including old versions of JQuery
Changed the button style to “Official Icons”

Site URL is https://www.luxurytraveldiary.com problem occurs on all OSX browsers I have tested on, (latest versions of Chrome, FF, Opera and Safari).

One point of note is that my PHP install doesn’t currently support multibyte, knowing what multibyte does I doubt that’s the problem but am happy to be corrected. Would like to know for sure before I go to the trouble of rebuilding PHP.

Any assistance very gratefully received.