cyberfry, you probably needed a reboot for some reason. probably some of the kernel source was pointing to the wrong place or some such.
anyway, I find the 261 nvnet portion to be garbage anyway that continuously causes my computer to stall and lockup in various areas on my nforce1. I hope you fair better, but I have reverted to substitutiing the 256 nvnet into the 261 build and that works fine.
...And now abideth faith, hope, charity, these three; but the greatest of these is charity.