Carsten Dominik wrote:

>Yes.  Unfortunately I don't know a way to fix this.

This is a known problem and texinfo provides the options

,----
| @set txicodequoteundirected
|     causes the output for the ' character to be the undirected single quote, like this:
|
|     '.
| @set txicodequotebacktick
|     Cause the output for the ` character to be the standalone grave accent, like this:
|
|     `.
`----
http://www.gnu.org/software/hello/manual/texinfo/Inserting-Quote-Characters.html

To make these options work the file texinfo.tex in doc has to replaced
by a recent version.  Here it is located at

/usr/share/texmf/tex/texinfo/texinfo.tex

Compiling the manual with this texinfo.tex works fine and the quotes

HTH,
  -- David

[1] http://lists.gnu.org/archive/html/bug-texinfo/2006-06/msg00002.html
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