compiz - Nov 2006 - Lock screen not working correctly in twinview

Hi, I'm testing compiz with nvidia driver 9629. twinview active on 2
monitor(same resolution on both 1280x1024)and I found a strange
behaviour, when I try to lock the screen only the primary monitor get
the screensaver instead on the second monitor I can still move windows
and see it's content. 

Best regards, 

Emilio Pozzulo