I've just installed Opera stable 35 under Ubuntu 14.04.
It seems that this version contains an integrated VPN service.
Using http://ip4.me I get a russian IP address. Let's call it IP1.
Let's call IP0 my personal IP address.
I'm trying to understand the logic of the Opera behaviour according to the following observations:
-normal window with Opera turbo: address IP1
-normal window without Opera turbo: address IP0
-private window with or without Opera turbo: adresse IP0
Is there anyone who could help me to understand that behaviour ?