Vista indexer is overlooking files in Offline Cache

KB Article 932989 discusses the issue, but solution does not work. My issue
most resembles "Cause 5."
http://support.microsoft.com/kb/932989

I have Vista Ultimate x86 SP1 (clean install) and have several gigs of
documents available using the "Available Offline" feature.

Vista indexes these files (verified by the index files count increasing
dramatically when available offline feature enabled). However the Vista
Indexer is overlooking these files when I search. Offline Files is selected
to be indexed under Indexing Options.

Per the KB article, I have tried the "Rebuild" and "Reset to Default"
options under Indexing Options. Both have failed to fix the problem.