symbol rendering difference between HTML and PDF

[Robert P. J. Day]

   probably an artifact of the PDF generation, but the online HTML
of the nightly build here:

http://svnbook.red-bean.com/nightly/en/svn.branchmerge.basicmerging.html#svn.branchmerge.changesets

reads (correctly):  "if you compare tree N with tree N?1"

while the online PDF reads: "if you compare tree N with tree N#1"

   is this an issue with the PDF generation?  or my browser?  or what?  
  just curious.

rday