Why am I getting a Security Warning when I visit my site?

If you have www.siteaddress.com as your primary domain then that means that your SSL certificate is applied to that domain/sub-subdomain combination.  Normally the non-www URL will forward to the www URL, but not if you explicitly add the https before it.  

So here's a break down.  What happens if you type the following into your address bar:

• www.siteaddress.com - forwards to https://www.siteaddress.com
• siteaddress.com - forwards to https://www.siteaddress.com
• https://www.siteaddress.com - nothing, this is your default address
• https://siteaddress.com - You get a security warning because SSL is not applied to this domain.

Just make sure you don't ever link to https://siteaddress.com.  Otherwise you should be okay, the only way someone would get that security warning is if they type in your domain, without the www, and WITH the https prefix.