ACPI support in Vista and Sleep button

[A-Ge0]

Hello! I have a thinkpad T42 and the latest driver for power management. The problem I experience is the following:
The sleep button used to work like a charm (it stopped the hard drive closed the monitor and waited for a key press to wake up) but now suddenly stopped working and the only thing it does is close the monitor and a mouse gesture turns it on again like it was in screensaver mode.

I also have a T41 and experience the same problem, any ideas? anyone with the same problem?