PCI Utils looks into the ?wrong? bus by default.

Here is my example...

root@zeppelin:[ /proc/bus/pci/00 ] lspci
pcilib: Cannot open /proc/bus/pci/20/00.0
lspci: Unable to read 64 bytes of configuration space.
root@zeppelin:[ /proc/bus/pci/00 ] man lspci
root@zeppelin:[ /proc/bus/pci/00 ] lspci -s 0:
00:00.0 Host bridge: Intel Corporation 430TX - 82439TX MTXC
(rev 01)
00:01.0 ISA bridge: Intel Corporation 82371AB PIIX4 ISA (rev
01)
00:01.1 IDE interface: Intel Corporation 82371AB PIIX4 IDE
(rev 01)
00:01.2 USB Controller: Intel Corporation 82371AB PIIX4 USB
(rev 01)
00:01.3 Bridge: Intel Corporation 82371AB PIIX4 ACPI (rev
01)
00:02.0 VGA compatible controller: Neomagic Corporation
NM2160 [MagicGraph 128XD]
00:0a.0 CardBus bridge: Texas Instruments PCI1131 (rev 01)
00:0a.1 CardBus bridge: Texas Instruments PCI1131 (rev 01)
r