Vista - Media Center Extensibility Host

I have been getting reports of an "APPCRASH" when I launch Media Center.
The "Media Center Extensibility Host" fails to load probably due to my
firewall, but Media Center itself loads and seems to run fine. My
question is, should I care? What does this host do? If I should care,
how do I allow this in my firewall config?

Windows Vista Home Premium...Here's the details;

> Product
> Media Center Extensibility Host
>
> Problem
> APPCRASH
>
>
>
> Description
> Stopped working
>
> Problem signature
> Problem Event Name: APPCRASH
> Application Name: ehExtHost.exe
> Application Version: 6.0.6000.16484
> Application Timestamp: 4642675b
> Fault Module Name: ntdll.dll
> Fault Module Version: 6.0.6000.16386
> Fault Module Timestamp: 4549bdc9
> Exception Code: c00000fd
> Exception Offset: 000447dd
> OS Version: 6.0.6000.2.0.0.768.3
> Locale ID: 1033
>
> Files that help describe the problem
> Version.txt
> memory.hdmp
> minidump.mdmp


Thanks,

Dave