Comment 3 for bug 1058515

I just tried switching from xfce4-terminal to gnome-terminal, only to discover that new tabs spawned via Ctrl+Shift+T (or File->New Tab) in the latter fail to inherit my session's $SSH_AUTH_SOCK or $SSH_AGENT_PID.

The second-best workaround is indeed to only spawn new tabs via "gnome-terminal --tab", but that's a bit unwieldy and it's not quite the same (the new tab inherits the environment of the shell running that command, which may have changed from the session environment), so I'm afraid the best workaround was to switch back to xfce4-terminal...