I got the attention of the develop team now, maybe this issue can be fixed.
My system is an AMD Athlon 2700+ at 2.17Ghz Asus A7v8x board (Via kt400 chipset) 512MB Ram, Geforce fx5900XT video card. And windows 2003 Server (unsupported i am sure)
What makes this game unplayable is the fact that I only got this patch for online play. 9 times out of 10 I press fly after joining an online game and by the time i am in the plane I have selected I am no longer connected to the server. I rejoin and have a ping of 0 and can not join the multiplayer game. I thought it was a network issue so i tested everything. Things worked great until i installed flaming cliffs. I can send log files for the game if you need them.