Dealer came by. After changing to static, still the same error. Lutron tech support even told us to change the iPhone's WiFi to a static address after that didn't work. So the techs at Lutron apparently think static IP is the preferred fix for this sort of error. We didn't get anywhere with Lutron tech support so now we think it's a defective unit unrelated to the static talk from Lutron techies.
5/15/12 at 4:43pm