If it is the problem I think it is, then you can workaround it by adding your wlan
driver to /etc/modprobe.d/blacklist.conf ( in my case I had to add: blacklist brcmsmac )
and then load the module via modprobe in /etc/rc.d/rc.local...
Problem is caused by a change in udev, upgrading to a newer kernel version (3.4+) should also fix it.
If you want to know more details: http://marc.info/?l=linux-netdev&m=132655490826765&w=2