From https://bitcointalk.org/index.php?topic=63165.msg739328#msg739328

I'm not using the proxy option, but the new GUI is showing some strange IPv6 looking address in the proxy field.

e.g. a9b1:0:f2:v532:200:0:0:0

Once I change it, its all good.