Is it just me or Apple has completely disabled the TCP/IP settings for BT and USB connections for iPhone tethering (and possibly any other mobile devices)? I can now only set the IP addresses and DNS server. No Proxies or WINS settings tabs. I have also noticed that if you setup a USB tethering connection in Leopard and upgrade to Snow Leopard, the settings are still available, but NOT if you make a clean install of Snow Leopard and create a new iPhone USB tethering connection. I always use a SOCKS5 when I'm using my tethering connection for security and better/faster connection with my manual proxy server setup. I find the new "options" in SL very limited, not only for my usage. Screenshot attached.