I have Lenovo X300 notebook with Ubuntu Jaunty alpha6 installed on it and I'm experiencing exactly the same problem.
I'm unable to connect to the WPA/WPA2 protected network - network manager is constantly asking me for WPA/WPA2 key (SSID is not hidden).
Just like Gábor wrote, when asked to retype WPA/WPA2 key, the password text box is pre-filled with long hexadecimal string.
I have Lenovo X300 notebook with Ubuntu Jaunty alpha6 installed on it and I'm experiencing exactly the same problem.
I'm unable to connect to the WPA/WPA2 protected network - network manager is constantly asking me for WPA/WPA2 key (SSID is not hidden).
Just like Gábor wrote, when asked to retype WPA/WPA2 key, the password text box is pre-filled with long hexadecimal string.