Xen-hypervisor doesn't boot

[Artem <artswan@ya.ru>]

Hello,

Xen hypervisor doesn't boot after upgrade following packages:

linux-image-2.6.32-5-xen-amd64 2.6.32-32
linux-libc-dev 2.6.32-32
linux-base 2.6.32-32

But boots ok after downgrade to:

linux-image-2.6.32-5-xen-amd64 2.6.32-31
linux-libc-dev 2.6.32-31
linux-base 2.6.32-31

"Doesn't boot" means that it quickly shows some text and goes to reboot. 
Looks like it can not boot the kernel. I'm using  
xen-hypervisor-4.0-amd64 4.0.1-2. Feel free to ask any further details 
if need.