[2.6.0-test9] ACPI-0094: *** Error: Could not acquire interpreter mutex

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Today I got round to installing 2.6.0-test9. All seems to work great, except for this strange message in my dmesg:

ACPI-0094: *** Error: Could not acquire interpreter mutex

which comes back now and again. Is this something I should worry about? I couldn't find anything about it on the net...

System is an ACER TravelMate 803LCi.

ACPI Related bootmessages:

Nov 6 14:55:52 precious kernel: BIOS-e820: 000000001ff70000 - 000000001ff7b000 (ACPI data)
Nov 6 14:55:52 precious kernel: BIOS-e820: 000000001ff7b000 - 000000001ff80000 (ACPI NVS)
Nov 6 14:55:52 precious kernel: ACPI: RSDP (v000 ACER ) @ 0x000f60c0
Nov 6 14:55:52 precious kernel: ACPI: RSDT (v001 ACER Cardinal 0x20020730 LTP 0x00000000) @ 0x1ff74c61
Nov 6 14:55:52 precious kernel: ACPI: FADT (v001 ACER Cardinal 0x20020730 PTL 0x0000001e) @ 0x1ff7af64
Nov 6 14:55:52 precious kernel: ACPI: BOOT (v001 ACER Cardinal 0x20020730 LTP 0x00000001) @ 0x1ff7afd8
Nov 6 14:55:52 precious kernel: ACPI: DSDT (v001 ACER Cardinal 0x20020730 MSFT 0x0100000d) @ 0x00000000
Nov 6 14:55:53 precious kernel: ACPI: Subsystem revision 20031002
Nov 6 14:55:53 precious kernel: ACPI: IRQ 9 was Edge Triggered, setting to Level Triggerd
Nov 6 14:55:53 precious kernel: ACPI: Interpreter enabled
Nov 6 14:55:53 precious kernel: ACPI: Using PIC for interrupt routing
Nov 6 14:55:53 precious kernel: ACPI: PCI Root Bridge [PCI0] (00:00)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.AGP_._PRT]
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKA] (IRQs *10)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKB] (IRQs *10)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKC] (IRQs *10)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKD] (IRQs *5)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 7 9 11 12)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 7 9 11 12)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKG] (IRQs 10)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKH] (IRQs *10)
Nov 6 14:55:53 precious kernel: ACPI: Embedded Controller [EC0] (gpe 29)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.HUB_._PRT]
Nov 6 14:55:53 precious kernel: ACPI: Power Resource [PFN0] (off)
Nov 6 14:55:53 precious kernel: ACPI: Power Resource [PFN1] (off)
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKA] enabled at IRQ 10
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKD] enabled at IRQ 5
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKC] enabled at IRQ 10
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKH] enabled at IRQ 10
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 10
Nov 6 14:55:53 precious kernel: ACPI: PCI Interrupt Link [LNKE] enabled at IRQ 10
Nov 6 14:55:53 precious kernel: PCI: Using ACPI for IRQ routing
Nov 6 14:55:53 precious kernel: ACPI: AC Adapter [ACAD] (off-line)
Nov 6 14:55:53 precious kernel: ACPI: Battery Slot [BAT1] (battery present)
Nov 6 14:55:53 precious kernel: ACPI: Battery Slot [BAT2] (battery absent)
Nov 6 14:55:53 precious kernel: ACPI: Power Button (FF) [PWRF]
Nov 6 14:55:5