>This is not what you asked, but another data point (using FF30).
>
>1. Logged in this morning to UT, lock icon. Browsed some messages. Did NOT log out of UT
>2. Navigated to other pages on 1st tab, also opened other tabs
>3. Two hours later - closed all tabs except 1st one
>4. Used back button to navigate back to most recent UT page
>5. Now have warning/triangle icon
>
>Maybe an SSL session is timing out?

Is this something that you observed recently?