We have a "wildcard" certificate installed on our webserver, allowing content on any subdomain to be accessed securely. We have discovered that when accessing pages with Internet Explorer on some machines, a notification appears stating the folowing:
To help protect your security, Internet Explorer has blocked this website from displaying content with security certificate errors. Click here for options...
This is ocurring on two machines running WinXP SP3 and IE8. It is also ocurring on two machines running Win7 with IE9.
We have checked through the source of the pages and checked that all linked content is being served without error.
An example of where this problem occurs is the page at https://members.chillisauce.co.uk/
Can someone please take a look and provide some hints on what is causing this issue?