I get a kernel panic shortly after "Enabling swap space": 

call trace

<0212b1e3> run_timer_softirq+0xe0/0x32b
<02134c70> rcu_do_batch+0x26/0x2e
<02127435> _do_softirq+0x35/0x73
<0210c3c4> do_softirq+0x4b/0x4d
=================================================
<0210b7b7> do_IRQ+0x2f7/0x303

kernel/timer.c:295:spin_lock(kernel/timer.c:0230e3a0) already locked
by kernel/timer.c/392
Kernel panic: Fatal exception in interrupt
In interrupt handler - not syncing

a similar error message can be found in bug 118202 except for the call
trace which is different...

also, interestingly, similar to 118202, issuing the command
"/sbin/chkconfig kudzu off" to bash and then rebooting eliminates the
kernel panic.

i have an ATI radeon pci card and an adaptec 4300 fireconnect firewire
pci card. 

i can't get any of the 2.6.3 kernels or arjanv's 2.6.4 kernel to work
since updating several packages recently (without turning off kudzu).
i was forced to revert back to the 2.6.1-1.65 kernel which luckily for
me works fine even with kudzu on.

btw, unrelated i think, but when i rpm install the 2.6.4 kernel i get
the following error messages:

WARNING: /lib/modules/2.6.4-1.275/unsupported/drivers/video/sstfb.ko
needs unknown symbol fb_find_mode
WARNING:
/lib/modules/2.6.4-1.275/unsupported/drivers/video/aty/radeonfb.ko
needs unknown symbol fb_find_mode
WARNING:
/lib/modules/2.6.4-1.275/unsupported/drivers/video/aty/aty128fb.ko
needs unknown symbol fb_find_mode
WARNING: /lib/modules/2.6.4-1.275/kernel/drivers/video/tridentfb.ko
needs unknown symbol fb_find_mode