VM freeze in 1.9 version

[jls-ol]

Hi all,
I run a VM (Linux suse 2.6.32.12-0.7-default #1 SMP 2010-05-20 11:14:20 +0200 x86_64 x86_64 x86_64 GNU/Linux) on proxmox server

[TABLE="class: normal"]
[TR="bgcolor: #FFFFFF"]
[TD]CPU(s)[/TD]
[TD]8 x Quad-Core AMD Opteron(tm) Processor 2350[/TD]
[/TR]
[TR="bgcolor: #EDEDED"]
[TD]CPU Utilization[/TD]
[TD][/TD]
[/TR]
[TR="bgcolor: #FFFFFF"]
[TD]IO Delays[/TD]
[TD][/TD]
[/TR]
[TR="bgcolor: #EDEDED"]
[TD]Physical Memory (7.86GB/1014MB)[/TD]
[TD][/TD]
[/TR]
[TR="bgcolor: #FFFFFF"]
[TD]Swap Space (7.00GB/0KB)[/TD]
[TD][/TD]
[/TR]
[TR="bgcolor: #EDEDED"]
[TD]HD Space root (36.67GB/1.40GB)[/TD]
[TD][/TD]
[/TR]
[TR="bgcolor: #FFFFFF"]
[TD]Version (package/version/build)[/TD]
[TD]pve-manager/1.9/6567[/TD]
[/TR]
[TR="bgcolor: #EDEDED"]
[TD]Kernel Version[/TD]
[TD]Linux 2.6.32-6-pve #1 SMP Fri Nov 4 06:54:05 CET 2011[/TD]
[/TR]
[/TABLE]

proxmox server version:

# pveversion -v
pve-manager: 1.9-26 (pve-manager/1.9/6567)
running kernel: 2.6.32-6-pve
proxmox-ve-2.6.32: 1.9-50
pve-kernel-2.6.32-4-pve: 2.6.32-33
pve-kernel-2.6.32-6-pve: 2.6.32-50
qemu-server: 1.1-32
pve-firmware: 1.0-14
libpve-storage-perl: 1.0-19
vncterm: 0.9-2
vzctl: 3.0.29-3pve1
vzdump: 1.2-16
vzprocps: 2.0.11-2
vzquota: 3.0.11-1
pve-qemu-kvm: 0.15.0-1
ksm-control-daemon: 1.0-6

Since I moved in version 1.9
As soon as want to allocat more than 1 socket or more than 1 core the VM boot and somme time ago it freeze with CPU 100%
The only methode to quit the freeze state is to reset the VM.

If I configure one socket and one core the VM works normaly.

Someone has idea?

If not how to get back in version 1.8 without all reinstall?

Regards,

JLS