I've done a bit of playing around and checking against 3 browsers - Safari, Chrome and Firefox
If I deactivate the Slick contact form plug in
then it works on Firefox, and Safari (but only after a refresh after first coming on to a page). In Chrome I still get around 50px of space at the bottom of the page.
Also, the right sidebar appears to be 'stuck' to the footer, even if there is only one widget in it, with only one word of content.
So there appears to be some sort of conflict issue with the slick contact form plug in, Chrome, and the need for a refresh on Safari and Firefox.
Any advice would be gratefully received.
How much data would I lose when updating to 3.7.1? This is a really complicated build (involving around 70 widgets) so losing any of that would be a killer!