Why does the browser indicate that the page is not using secure SSL by showing a warning icon?

It’s nothing to worry about, your connection between Solve and your browser is still encrypted. In fact, it’s impossible to receive data from our service that is not encrypted. You’ll even see this from time to time when using Gmail alone. Here’s why …

Having the warning through the HTTPS means that at least one object on the page was not delivered securely. This is something like an image, or Google Map, etc. that is loaded from a different web address. In Chrome, if you choose Menu > Tools > Developer Tools > Network then reload the page you can hover over each resource to see if it’s using HTTP or HTTPS.