What is the real problem? Is it a problem with WM
not displaying emails properly for one user? Or are
these emails you want to save as MHT files and
you have the problem from one user account?

Hi VistaRookie!

First of them: WinMail isn't able to display content of mails in one user
account / profile anymore.

During my way to find the reason I notice that IE8 also have trouble to
display *.mhtml files. (I suppose exactly the same reason for both problems.)