kvm-82 and fedora guests

hi,
with kvm-82 (and 81 too) it's not possible to upgrade from fedora-9 guest to fedora-10 on a centos-5 host. installation even with graphical, text or preupgrade hang at different phase of the upgrade (mostly during anaconda boot process).
and even the latest fedora-9 kernel not able to boot. the last working version kernel-2.6.25.14-108.fc9.i686.
yours.

- host:
- Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
- Intel S3000AHV
- 8GB RAM
- CentOS-5.2
- kernel-2.6.18-92.1.22.el5 x86_64 64bit
- guest-1:
- CentOS-5.2 - 4 vcpu
- kernel-2.6.18-92.1.22.el5 i386 32bit
- guest-2:
- CentOS-5.2 - 4 vcpu
- kernel-2.6.18-92.1.22.el5 x86_64 64bit
- guest-3:
- Mandrake-9 - 1 vcpu
- kernel-2.4.19.16mdk-1-1mdk 32bit
- guest-4:
- Mandrake-10 - 1 vcpu
- kernel-2.6.14.2-p4-smp 32bit
- guest-5:
- Windows XP Professional 32bit - 2 vcpu
- guest-7:
- Fedora-9 - 4 vcpu
- kernel-2.6.25.14-108.fc9.i686

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