Think eth0 linked to reapeater bridge

Auto lo
iface lo inet loopback

Iface eth0 inet static
address 192.168.1.52
Network 192.168.1.1
gateway 192.168.1.1
netmask 255.255.255.0
broadcast 192.168.1.255

Allow hotplug wlan0
iface wlan0 inet manual
wpa-roam/etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp

Auto eth0
auto wlan0