Hey Richard,

I am really sorry for the delay of this reply as it is a weekend for us here.

It seems like stumbleupon isn't compatible with https sites, so hitting this as you reported.

You can take a look of this reference link here : https://getsatisfaction.com/stumbleupon_help_center/topics/badge_widget_https_mixed_content_problem?topic-reply-list%5Bsettings%5D%5Bfilter_by%5D=all

Thank you for the link and explanation Arlex, i am amazed Stumble Upon do not have such a basic requirement, if only they were run by the Stackideas team....

I switched off the option for a Stumble Upon icon and will keep it off until they join the 21st century.

Everything is fine now.

You're welcome.