shutdown doesnt shutdown the computer

[Petr Janda]

Hi,
I often watch movies untill I fall asleep. As this has been generating quite a 
bit of income for electricity companies, I tried using shutdown -h +60.

This makes the computer though proceed with shutdown but stop at the very end 
saying something like "You can shut down your computer now or press a button 
to reboot".

Why is this happening? ACPI? Whats the best way to time a shutdown?

Thanks,
Petr