A Debian user submitted the bug below against pan. The entire bug can be
viewed at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=203764 :

Package: pan
Version: 0.14.0-3
Severity: normal

First, let me admit I haven't looked at any "news" RFCs, but just assume
the same RFCs as for mail apply.

On some headers using Quoted Printable, pan incorrectly identifies the
header as malformatted and prints it verbatim. Example:

    Re: =?ISO-8859-1?Q?Arbeiten_f=FCr_den_Standard...?=

This comes out exactly like it looks here. The underscores are
representations of 0x20, and that's the space in ISO-8859-1 (and most
other encodings). Not pan handles header without underscore correctly:

    Re: Arbeiten =?iso-8859-1?Q?f=FCr?= den Standard...
 becomes:
    Re: Arbeiten für den Standard...

-- System Information:
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux kosh 2.4.21-2-k7 #1 Sat Jul 5 03:47:02 EST 2003 i686
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8

Versions of packages pan depends on:
ii  libatk1.0-0                   1.2.4-1    The ATK accessibility toolkit
ii  libc6                         2.3.1-17   GNU C Library: Shared libraries an
ii  libglib1.2                    1.2.10-9   The GLib library of C routines
ii  libglib2.0-0                  2.2.2-1    The GLib library of C routines
ii  libgnet1.1                    1.1.9-4    GNet network library
ii  libgtk2.0-0                   2.2.2-2    The GTK+ graphical user interface 
ii  libgtkspell0                  2.0.4-6    a spell-checking addon for GTK's T
ii  libpango1.0-0                 1.2.3-1    Layout and rendering of internatio
ii  libpango1.0-common            1.2.3-1    Modules and configuration files fo
ii  libxml2                       2.5.7-1    GNOME XML library
ii  zlib1g                        1:1.1.4-14 compression library - runtime