Here is an update on this. The file
NationalProblemLibrary/macros/FortLewis/AnswerFormatHelp.pl
was
Modified Sun Sep 9 07:07:55 2012 UTC by jj
Pulling changes from git repository.
Unfortunately, the git version was not compatible with the svn distribution of WeBWorK. We have reverted to the previous version of AnswerFormatHelp.pl which works with the svn distribution.
Arnie