Noticed this on WP 7.5 and hoped it would be fixed but maybe not.
Wifi tries to default to an IP address outside of my routers range (aaa-bbb-1-ccc = router aaa-bbb-2-ccc = phone)
To fix I just keep deleting the connection until it finally gets to assigned a proper IP.

Is it just me or is there something I'm missing in my router, or is there an issue?

Any help greatly appreciated...