Thank you for getting back to me.
According to your FAQ (http://mappresspro.com/mappress-faq), MapPress caters for the issue, provided one uses the jQuery UI Tabs.
So I installed the plugin WP UI (http://wordpress.org/plugins/wp-ui/). Is this not correct?
However, as you can see on http://126.96.36.199/~lachlrwg/, the issue still presists. The top toggles are from WP UI.
Can you shed some light please?