Windows Mobile and PEAP

If you ever had to get Windows Mobile 5 powered Devices to work with a WPA (TKIP) + PEAP setup (using your own inhouse CA) and were near a nervous breakdown because of the damn "The Server Certificate is issued by an unknown authority"; message you might wanna ad this registry key:

\HKLM\Comm\EAP\Extension\25\ValidateServerCert=dword:00000000