I don't believe DHCP lease renews should cause a logout. Maybe a momentary pinkout, but not a logout. I've moved my laptop from location to location and had TWS reconnect properly (on totally different networks, clearly with new DHCP addresses).
Just to clarify, I am equating a pinkout to a logout. Also, I renewed my lease through my router at around midnight last night and I had no problems this morning. Another note: I believe "ipconfig /all" is showing my local IP lease, not my router lease to my cable provider. So thanks for the suggestions. For now the problem has disappeared.
Got it -- it must be the case that your IP changes too on a renew.... ISPs which reassign the same IP should not see any loss in connectivity.
If you use the link below you will see the IP address that your service provider has currently assigned to you. http://www.umi.com/whoami I use DSL so I don't have a permanent IP address but a while back I thought I read that cable providers assigned fixed IP addresses. If I power-down my DSL modem I'll generally get a new IP address from Verizon when I turn back on. You might see what happens with your cable modem for future help in troubleshooting. I know of no way of determining the lease status (if there is a lease) between you and your ISP except by inference. Jack