spurious APIC interrupt on CPU#0, should never happen ...

Hi,
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sorry if message appears twice. Google apparently delayed its postign for
too long
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I have been getting lots of lines in my dmesg dump looking like:
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"APIC error on CPU0: 01(01)"
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and then I occasionally see also errors looking like:
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"spurious APIC interrupt on CPU#0, should never happen."
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I got a Seagate Barracuda 7200.7 ST3160023A 160GB Hard Drive
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running fdisk /dev/sda tells me
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Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 1 2491 20008926 83 Linux
/dev/sda2 2492 9963 60018840 83 Linux
/dev/sda3 9964 19457 76260555 5 Extended
/dev/sda5 9964 19457 76260523+ c W95 FAT32 (LBA)
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this is the hardware baseline I am trying it on:
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root@Knoppix:~# lspci -v
00:00.0 Host bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333]
Flags: bus master, medium devsel, latency 0
Memory at e0000000 (32-bit, prefetchable) [size=64M]
Capabilities: [a0] AGP version 2.0
Capabilities: [c0] Power Management version 2

00:01.0 PCI bridge: VIA Technologies, Inc. VT8366/A/7 [Apollo KT266/A/333
AGP] (prog-if 00 [Normal decode])
Flags: bus master, 66MHz, medium devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
Memory behind bridge: e6000000-e8ffffff
Prefetchable memory behind bridge: e4000000-e5ffffff
Capabilities: [80] Power Management version 2

00:08.0 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
(prog-if 10 [OHCI])
Subsystem: ALi Corporation Unknown device 5272
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 5
Memory at ea004000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2

00:08.1 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
(prog-if 10 [OHCI])
Subsystem: ALi Corporation Unknown device 5272
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 5
Memory at ea000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2

00:08.2 USB Controller: ALi Corporation USB 1.1 Controller (rev 03)
(prog-if 10 [OHCI])
Subsystem: ALi Corporation Unknown device 5272
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 5
Memory at ea001000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2

00:08.3 USB Controller: ALi Corporation USB 2.0 Controller (rev 01)
(prog-if 20 [EHCI])
Subsystem: ALi Corporation Unknown device 5272
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11
Memory at ea002000 (32-bit, non-prefetchable) [size=256]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port

00:08.4 FireWire (IEEE 1394): ALi Corporation M5253 P1394 OHCI 1.1
Controller (prog-if 10 [OHCI])
Subsystem: ALi Corporation M5253 P1394 OHCI 1.1 Controller
Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 10
Memory at ea003000 (32-bit, non-prefetchable) [size=2K]
[virtual] Expansion ROM at 88020000 [disabled] [size=64K]
Capabilities: [80] Power Management version 2

00:0b.0 Multimedia audio controller: Ensoniq 5880 AudioPCI (rev 02)
Subsystem: Ensoniq Creative Sound Blaster AudioPCI128
Flags: bus master, slow devsel, latency 32, IRQ 11
I/O ports at c000 [size=64]
Capabilities: [dc] Power Management version 1

00:0d.0 Ethernet controller: 3Com Corporation 3c905 100BaseTX
[Boomerang]
Flags: bus master, medium devsel, latency 32, IRQ 5
I/O ports at c400 [size=64]
[virtual] Expansion ROM at 88030000 [disabled] [size=64K]

00:0f.0 FireWire (IEEE 1394): NEC Corporation uPD72874 IEEE1394 OHCI
1.1 3-port PHY-Link Ctrlr (rev 01) (prog-if 10 [OHCI])
Subsystem: NEC Corporation uPD72874 IEEE1394 OHCI 1.1 3-port
PHY-Link Ctrlr
Flags: bus master, medium devsel, latency 32, IRQ 5
Memory at ea005000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [60] Power Management version 2

00:11.0 ISA bridge: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
Subsystem: VIA Technologies, Inc. VT8233 PCI to ISA Bridge
Flags: bus master, stepping, medium devsel, latency 0
Capabilities: [c0] Power Management version 2

00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/
VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP
PriP])
Subsystem: VIA Technologies, Inc. VT82C586/B/VT82C686/A/B/
VT8233/A/C/VT8235 PIPC Bus Master IDE
Flags: bus master, medium devsel, latency 32, IRQ 11
I/O ports at c800 [size=16]
Capabilities: [c0] Power Management version 2

00:13.0 RAID bus controller: Triones Technologies, Inc.
HPT366/368/370/370A/372/372N (rev 05)
Subsystem: Triones Technologies, Inc. HPT370A
Flags: bus master, 66MHz, medium devsel, latency 120, IRQ 10
I/O ports at d800 [size=8]
I/O ports at dc00 [size=4]
I/O ports at e000 [size=8]
I/O ports at e400 [size=4]
I/O ports at e800 [size=256]
Expansion ROM at 88000000 [disabled by cmd] [size=128K]
Capabilities: [60] Power Management version 2

01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400/G450
(rev 82) (prog-if 00 [VGA])
Subsystem: Matrox Graphics, Inc. Millennium G450 Dual Head
Flags: bus master, medium devsel, latency 32, IRQ 11
Memory at e4000000 (32-bit, prefetchable) [size=32M]
Memory at e6000000 (32-bit, non-prefetchable) [size=16K]
Memory at e7000000 (32-bit, non-prefetchable) [size=8M]
[virtual] Expansion ROM at e6020000 [disabled] [size=128K]
Capabilities: [dc] Power Management version 2
Capabilities: [f0] AGP version 2.0
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What do these errors actually mean? What is causing it? is it
hardwareo or software related or both?
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Is it anyway to fix them
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the version of knoppix I am using is 5.1.1 (the latest)
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thanks
lbrtchx