Upgraded my machine from openSUSE 11.1 to 11.2. And bumped royally into
bnc#546575.
There's a typo in /etc/udev/rules/70-persistent-net.rules (an apparent holdout from openSUSE 10.x).
So if your machine has a manually configured IP address, check
/etc/udev/rules/70-persistent-net.rules
before you update. If it contains the string
ATTRS{address}
, edit it so that it becomes
ATTR{address}
. Now the network configuration will be preserved after the upgrade.