snowball wifi device mac address changes every boot

On snowball, with:
http://snapshots.linaro.org/precise/hwpacks/lt-snowball-x11-base/156/hwpack_linaro-lt-snowball-x11-base_20120626-156_armhf_supported.tar.gz
http://snapshots.linaro.org/precise/images/ubuntu-desktop/247/linaro-precise-ubuntu-desktop-20120626-247.tar.gz

I am seeing the wireless device, but it is detected as wlan2. As such, it doesn't show up by default in network manager. I can configure it anyway, and it seems to work though. There are no other wlan* devices detected, however there seem to have been some in the udev rules, even though.

root@linaro-ubuntu-desktop:/etc/udev/rules.d# cat 70-persistent-net.rules
# This file was automatically generated by the /lib/udev/write_net_rules
# program, run by the persistent-net-generator.rules rules file.
#
# You can modify it, as long as you keep each rule on a single
# line, and change only the value of the NAME= key.

# net device ()
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:80:e1:7b:1e:8b", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan0"

# net device ()
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:80:e1:42:ae:0f", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan1"

# net device ()
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:80:e1:ae:1e:99", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="wlan*", NAME="wlan2"

Looks like the mac address is not static for the wlan interface.