WPA2-Enterprise TLS not working in iOS 5

We have over 200 iPhone on our Corporate Wi-Fi network. We started having calls from our users saying that their Wi-Fi is not working anymore since they upgraded to iOS 5. It was working fine with previous version of iOS. We are using WPA2-Enterprise with TLS authentication. We were able to reproduce the issue. With my iPad, i'm not able anmore to connect to our corporate wi-fi on both vendor we use (Cisco and Motorola). The SSId was hidden, we tryed to broadcast it with no change. The only thing both vendor are sharing is the TLS authentication for the WPA2 auth. Can anyone help us ?

I had to:
1) connect the Ipad with a cable and enable "synch via wi-fi" option.
2) eject the ipad
3) restart the MAC
attempt synch --- FAILED
after looking at my set-up the MAC (or PC) must be conneced to the same wireless connection. My router has dual band capability. one connection is 2.4 ghz with one name, and 5 ghz with another name. Even though ALL the computers have same workgroup name, wi-fi synch would not work unless they were all on the same wireless connection (same ssID). go figure. once my mac was connected to the 2.4 Ghz SSID, wi-fi sync worked fine.

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