On 2006-05-04 14:30:06 -0700, Justin C. Walker wrote:
> \newcommand{\dx}{\rm dx}
^^^
Please read an introduction on font-changing commands in LaTeX
that is newer than 1995. \rm has been deprecated since the
release of LaTeX2e.
If you had used \textrm, this problem would've appeared.
Best
Martin
--
http://www.tm.oneiros.de