I use org-mode (currently v7.9.3) to build materials for the courses I teach.  I tend to use repeated underscores to indicate a blank, e.g.:

1) Fill in the _______.

Unfortunately, org-mode treats these as successive subscript requests, and the text that follows is severely disrupted when exported via LaTeX.  The local or global setting of `org-export-with-sub-superscripts' does not seem to affect this behavior.

It seems appropriate that:

- no subscripting should occur in the above case when `org-export-with-sub-superscripts' is set to nil or {}; and

- repeated underscores without any braces should probably not ever trigger subscripting on export.

Thanks for all the continued work on org-mode!

--Nathaniel