searchin file contents issue in vista?

I think there is an underlying problem or defficiency in Vista, with regards
to searching file contents, which microsoft still has not addressed after all
these months.

I have set up search to search the contents of files with the "Always Search
File Contents" option (it wasn't easy to figure out how to get to this option
in the first place!).
However, Vista will still not search the contents of my files unless I
change their type to .TXT... This is not an acceptable compromise and XP did
not have this very serious limitation.

I have looked everywhere, and it appears that this is the only way to get
Vista to look in file contents.

This is both a question as well as a feature request (because I really don't
think there is any way of setting up Vista to unilaterally search inside all
file types).