>>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?

Using FF 33.0
I see a grey triangle with a tooltiptext like (free translation) This page does not provide identy data

Normal https shows a grey lock

HTH

Lutz