Intel Mac OS X can't connect using 802.1x with TTLS authentication

Question

To login at the wireless network on my school I use the following settings:
802.1x connection with TTLS authentication and TTLS inner authentication set to PAP.
My MacBook Pro logs in, but has a self assigned ip-address and I can't use the network.
On my old iBook and my friend's Powerbook with exact the same settings it works perfect. (and gets an assigned ip-address throug DHCP.
Bug in the Intel version of Mac OS X I guess?

Answer 1

Regarding the post about other intel macs being unaffected, I don't have an imac so I don't know for sure, but the connectivity problems seem to be more widely reported for the macbooks. It's certainly possible they are affected as well, but I was under the impression they were using a different chipset and/or firmware. (note to self, check on that).
What I cant understand is why they have changed the
airport express card for the intel macs, albeit the
processor has changed but that shouldn't affect the
card as that should be processor
The intel macs were largely designed by intel. I suspect that apple provided case dimensions and a specifications list which intel then used for the designs. The wireless cards in the powerbooks were based (iirc) on a pc-card bus. The older airports were based on PCMCIA-16.
In the macbooks, it appears to be a mini-PCI-express. (I had to send my back for noise issues. ASP might tell you what bus it connects to). The benefit to this is better speed and the possibility of future expansion. Dell uses the same connector.
Some side-benefits of having the board designed by intel (or with heavy intel involvement) is that we can already dual-boot windows XP. Wireless seems to work fine if you run windows on the macbook. Therefore, I think this is a driver issue likely to be resolved sooner rather than later.