Yes, I understand that.  If the macro has other lines of code, it is quite
possible for other things to be 'buried' in the code.  However, I've tried
even with a macro that only has the recorded keystrokes to insert an Odd
Section Break:

Sub SecBrkOddPg()
   Selection.InsertBreak Type:=wdSectionBreakOddPage
End Sub

I've also searched every module to see if there are any references to any
other section breaks, but there do not appear to be any conflicts.

When you view the document itself, the Odd Section Break formatting mark
appears in the correct location.  However, it does not function as an Odd
section break, but rather as a Next section break. In Print Layout view, both
the document created with manual Odd section breaks and the document created
with automated (via macro) Odd section breaks appear the same -- all visible
formatting marks seem to be identical, and all settings in the Formatting
task pane are the same -- with the exception of the page numbers.  However,
in Print Preview, it's obvious that the manual one has inserted blank pages
where they're supposed to be, and the automated one has not.

Any other ideas?

Another question -- is there an 'easy' way to programmatically (via macro)
to replace all section breaks with Odd section breaks?  The Find/Replace
function allows you to search for and replace 'generic' section breaks, but I
don't see an option to specify the type of break.

Thanks!