That is utter bullsh!t. The non-ultra did have issues but the ultra is all good baby!!! Now one thing I did notice is that lots of people cannot get dual channel over 400 which could be fixed with a voltage mod to the northbridge. Im using that chipset and getting 440 on mine right now and my northbridge stay very cool.
Barton 2500+ @ 2200mhz (10x220 vcore @ 1.8)
Asus A7N8X Dlx 440 FSB
1gb Geil GD pc3500 Dual Channel (2-3-3-6)
Segata 80gb SATA 8.5ms seek
ATI Radeon 9800 Pro(420/720)