My autoyast installation stops at the point of installing grub with the message:
/boot/grub/device.map:1: error: No open parenthesis found
/boot/grub/device.map:2: error: No open parenthesis found

I can view and edit the device.map inside yast and it looks like this:
/dev/fd0   (fd0)
/dev/sda   (hd0)

After changing it to the following the problem disappears and the installation
goes on.
(fd0)   /dev/fd0
(hd0)   /dev/sda

The concerned part in the control-file looks like:
...
<bootloader>
   <activate config:type="boolean">false</activate>
      <device_map config:type="list">
        <device_map_entry>
          <firmware>(fd0)</firmware>
          <linux>/dev/fd0</linux>
        </device_map_entry>
        <device_map_entry>
          <firmware>(hd0)</firmware>
          <linux>/dev/sda</linux>
        </device_map_entry>
      </device_map>
   ...
</bootloader>
...

I didn't test it with beta4plus yet.