Just checked my Windows event logs... as I also run a supernode and yup, one Application Error at 2010-12-22 15:51:10 from Skype.

Tech data shows version 5:

    Faulting application name: Skype.exe, version: 5.0.0.152, time stamp: 0x4cb31516
    Faulting module name: KERNELBASE.dll, version: 6.1.7600.16385, time stamp: 0x4a5bdbdf
    Exception code: 0xe0fafafa
    Fault offset: 0x0000b727
    Faulting process id: 0xd20
    Faulting application start time: 0x01cba1ea3b70b5ef
    Faulting application path: C:\Program Files (x86)\Skype\Phone\Skype.exe
    Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
    Report Id: 4b2781d7-0de3-11e0-bbdc-005056c00008

I didn't upgrade voluntarily.