TBB new identity surprises users by closing all tabs

When I click the TorButton in TBB-3.0a4 and select "New Identity", the complete torbrowser is restarted. This is a secure but not very user friendly behavior because all pages I am viewing at the moment are gone. My usual browser session consists of 20-30 open tabs that loose. Selecting a new identity is important from time to time if the current circuit hangs or i.e. google does block the current exit node.

Trac:
Username: torland