I couldnt read all the stuff written, its too much, but im having the same problem. My hardware:

GA-K8NXP-SLI
A64 3800+ X2 2ghz @ 2.6ghz (260fsb)
4gb DDR 333mhz @ 420mhz

bla bla....

anyway, i opened all the aplications i had and nothing happened, i do think its something related to the net. Anyway ill wait to see your results with the kernel flag and then ill try ^^!