It's a known issue. Short version: site is as secure as it's ever been. There is an extra layer of security that is getting added in the near future that will make that warning go away.
Longer Version: that warning is letting you know that the site doesn't use Https, a security feature that mostly protects the site from a MIM attack (or Man in the Middle). A MIM is when someone is intercepting what you are typing, as you type it. Since most everything that is being typed here is going to a public forum that can be read by anyone, and there is zero eCommerce going on, it's never been something that made a lot of sense for us to protect against. However, now that Firefox has started flagging sites that don't use the feature, and Google Chrome will be doing the same come November, we'll be adding this extra security feature. Adding Https to the site has always been on the "to-do" list, but it's being pumped up in priority, mostly to keep the sites reputation as a safe place. No official ETA on that though
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