IPod touch wireless network password is case sensitive

I have spent a few hours trying to connect iPod touch to my existing wireless network without success. My wireless network is WPA with password, and finally got it working. The problem was with the password itself. It consists of capital letters and numbers. By default iPod enters letters as lower case, and it did not work. It was inconvenient to press shift all the time, and my thought was that password anyway is hex string so it should not be a problem. But it was.