On Thu, Jan 03, 2013 at 10:14:30AM +0100, Andreas Hanke wrote:
3.) I checked with aptitude the "libncurses5" and "libncursesw5" -> both is installed
You need to make sure the development package is also installed.
# apt-get install libncursesw5-devMake sure to rerun mutt's configure script after you install the package.