What causes the following message when using Internet Explorer?

"Domain Security
A script launched from one page has attempted to access information from a page from another domain . Since this could be used to obtain private information, it is not allowed."

Is it because I have expired certificates?

The Internet Explorer options list checkboxes for Verisign and THAWTE but when I view them, they all appear to be expired.

How can I get certificates that are not expired?

Is this message related to JAVA code execution?