smp 13xx kernels with hung processes on two processor dell poweredge 2400

[Anne & Lynn Wheeler]

smp 13xx kernels have hung processes with dell poweredge 2400, two 1ghz
processors, 1gbyte memory

last couple smp 13xx kernels seems to be specifically related to tcp/ip
and/or enet activity (box has two 100mbit enet interfaces) ... it would
run for awhile and then things start hanging and the only way out is to
hit the reset butto to force reset.

in the past, was able to drop back and run fine with smp kernel 1267.
latest round of updates did something so that 1267 no longer finishes
boot .... so i figured what the heck ... i would do FC4 final cdrom ...
which only put on a couple new files (did cleanup /boot on put on smp
kernel 1369) ... but didn't correct the problem and there is no kernel
1267 to fall back to.

looks like i'll have to regress to some earlier fc4 test system.