Why doesn't tmobile work at ORD?

Since upgrading to OS X 10.7.3, logging onto wifi networks has been much more difficult. At ORD, at least in the United Club, it is impossible using the T-Mobile network. Whenever I connect to the tmobile network, it opens the new (supposedly-quasi-automatic) wifi login screen. But it gets stuck there forever, with an indication that it is trying to connect to an apple URL. Why? Is there away around this? Here's the screen I get (forever):