[R] "R" help leaves out lines of text

[paul]

I am ramping up on the R statistical analysis environment.  I find
that the help leaves out entire lines of text.  The pager is
/usr/lib/R/bin/pager.  I changed it to /bin/less, but I see the same
symptom.  The problem shows up both in xterm and mintty.  The computer
is in a locked down environment, so a straight update of cygwin
packages is not an option.  

Is there anything further I can try to circumvent the problem?

My version info is:

   64-bit Cygwin DLL version 1.7.28
   R version 3.0.1-1