Kernel panic

I've been getting kernel panics for the last month and a half
The last good kernel that works is from May 8th
Here is what i get :

login: kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address   = 0x14
fault code              = supervisor read, page not present
instruction pointer     = 0x20:0xc063cdb8
stack pointer           = 0x28:0xd2ed0c54
frame pointer           = 0x28:0xd2ed0c70
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, def32 1, gran 1
processor eflags        = resume, IOPL = 0
current process         = 22 (irq11: xl0 uhci0+)
[thread pid 22 tid 100029 ]
Stopped at      propagate_priority+0x178:       movl    0x14(%esi),%eax

This is from sources and kernel built this afternoon while doing cvsup
I don't have any usb devices hooked up to the system.
It's a Dell Optiplex GX150 1GHZ Pentium 3





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