Thanks again!
I have now updated to v 1.5.8.2
When I deactivate all plugins, the problem persists.
If I click a pdf link on my site while Easy FancyBox is deactivated, then the pdf opens in a new window. If I click a pdf link on my site while Easy FancyBox is activated then I now get the overlay and a very tiny square, smaller than a thumbnail with the ‘x’ close button. This is the same thing I get when I click on my CTA. Still no contact form!
I’m going to have to admit defeat! Spent way too much time already!