2.4.21-benh2 bug?

[emorfin@caracol.red.cinvestav.mx]

Hi!

i upgrade my kernel to 2.4.21-benh2

All was great, but when i logout kde, or try to restart xserver (kdm) or i 
try to turnoff my box (tibook 15") it give me a black screen and:

kernel BUG at page_alloc.c:106!
vector:0 at pc = c00373c0, Ir c00373c0
msr = 9032, sp = ef751e00 [ef751d48]
current = ef750000, pid = 294, comm = XFree86
mon>

the only way to get out is turning of the box.

Is realy a bug or is my kernel configuration?

If is my kernel configuration, what i showld do to correct the problem?

Tanks