2.2.0b2 Guest hangs when going to Internet

[CaptainFlint]

I have a VM with freshly installed openSUSE 11.1. When I try to make it update itself from the Internet, in most cases the guest OS hangs completely. If I then try to do anything (reset VM or close it), VirtualBox itself hangs too, and the only thing I can do is to kill the VB process.

Host OS is Vista Business 32-bit.
VM is using Host Interface connected to the host Loopback adapter which is allowed to go to the Internet via my main host connection.
If I set it to NAT, it seems to work fine.

Guest OS log:
http://flint-inc.ru/Temp/vb/VBox_11.1.hang.log

In VB 2.1.4 the same openSUSE 11.1 distro works flawlessly