Can't configure network

[Igor Dovečer]

Latest xbian downloaded today 2015-02-07
DHCP -> 192.168.1.108, mask 255.255.255.255, no GW, just ns 192.168.1.1.
Internet doesn't work, can't ping xbian, can't ssh.

Xbian config also doesn't help, after configuring IP address manually I get:
"An unexpected error occured!"
Can't save network configuration at all. WTF?

What to do. OpenElec works, raspian and Raspbmc, but xbian doesn't.
Can't ssh, can't configure IP, DHCP return 255.255.255.255 as netmask?

Thanks for suggestion.