Your system has recently added an additional level of security
To ensure the protection of your client data your logged in area is protected with SSL encryption. You can see that by the lock symbol near the URL in your browser.
With the addition of these security measures, you may see browser security warning messages when you enter or leave a secure page. For example, when logging in and out of the private administration area.
Your browser may also warn you that there is secure and unsecure content. For the most part this should not happen as a well designed website should ensure that all content is properly formatted. There are however some areas where this is unavoidable.
When opening the page content editor there may be links to external images or page tracking code that points to an external site. In this case the security massage is identifying to you that that these links are present.
There are a few locations in the login area that are like this and they are: The "Theme" editor -- The editor reflects the public content of your website, and as such it contains no secure data.
These sort of warnings are to be expected in this area of the site, and are nothing to worry about. Additionally, when logging in or out you will also receive these types of warnings.
Again, these are to be expected and indicate that you are leaving the secure administration area for a public portion of your website.
Lastly, the Email and "My Pages" editors, which support images and links which may lead to unsecure content from external websites, may also display these types of warnings.
It is possible to turn off these warnings and you may have done that already by using the "Do Not Show" checkbox present within the message itself.
Depending on your browser, these messages may look different for you but they can always be disabled, and they are nothing to worry about. In fact, they represent a positive change in our system which further secures your data.