Accessing a WHS 2003 Share from Windows 8
Solution 1:
I figured this out. I decided to compare local security policies between my WHS box and my new Windows 8 Desktop. I stumbled on a setting named "Server SPN target name validation level". It was undefined on Win 8 and non-existent on my WHS box. I set my Win8 box to use "Accept if provided by client" and all of my shares now work.