blackboxer

I found a copy of the old one on my hard drive and reinstalled it as a temporary fix.

Same here. As recommended, I deactivated one plugin at a time and found the issue to be with AddThis for WP. I posted a question on their site and am waiting for the answer.

https://support.addthis.com/customer/portal/topics/57025-plugins-for-blogs-cms/questions

Someone helped me with this work-around. I did not use the plugin and instead added the standard Wibiya code inside this little conditional tag in footer.php:

<?php if(!is_ssl())
{
/* Preventing toolbar from being printed on ssl pages */
echo’
<script src=”https://cdn.wibiya.com/Toolbars/dir_xx/Toolbar_xx/Loader_xx.js&#8221; type=”text/javascript”> </script><noscript>Web Toolbar by Wibiya</noscript>’;
}
?>

WordPress has help pages on their conditional tags if one wants to omit other pages from showing the toolbar. Though, since this is not a plugin, the above will have to be re-entered into footer.php if one updates WP.

Someone helped me- the problem was the Header Image Resizer plugin, it was transferring the image via HTTP. I deactivated the plugin, used a header image of standard size (for the Twenty Eleven theme, and it looked fine on the secure pages.