I have the alternative status menu installed and I have never been able to hibernate. The screen just locks. I just added the testing repos to see if that would make a difference but has not.
Linux myhost 3.1.0-4-ARCH #1 SMP PREEMPT Mon Nov 7 22:47:18 CET 2011 x86_64 Intel(R) Core(TM) i5 CPU M 460 @ 2.53GHz GenuineIntel GNU/Linux
With Suspend, the screen locks also but it does suspend. Hibernate just hangs and the screen stays locked. With latest update alternative status menu does not even show hibernate option. I know my computer can hibernate because I have done so in ubuntu, fedora, chakra etc.