Gucharmap (Gnome Character Map) doesn't show some diacritics correctly

I started the gucharmap program with the start menu. When I clicked on Devanagari, there were some diacritics not displayed correctly. The problem exists with all fonts.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: gucharmap 1:3.2.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-15.25-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
Date: Sun Jan 22 23:45:25 2012
EcryptfsInUse: Yes
ExecutablePath: /usr/bin/gucharmap
InstallationMedia: Lubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: gucharmap
UpgradeStatus: No upgrade log present (probably fresh install)