I upgraded my Sarge desktop box from kernel 2.4 to 2.6 and started to see errors like this during boot:-

modprobe: FATAL: Error inserting pciehp ....
modprobe: FATAL: Error inserting shpchp ....

The reason for this is that hoplug is trying to load drivers for hardware that I don't have ( PCI express ).

The solution is to either ignore the errors, or to edit /etc/hotplug/blacklist and add the following at the bottom:-

    #PCI express not needed
    pciehp
    shpchp

No more errors.