RT 3.0.1 -> 3.0.2 webui character set

Hello

SuSE Linux 7.2
Apache 1.3.19, modperl1
RT 3.0.2
MYSQL 3.23.37
Perl 5.6.1

I have installed the upgrade from 3.0.1 to 3.0.2. Now, “some” umlauts
in the german webui are broken. The german translation comes from
It seems that only the translations in /opt/rt3/lib/RT/I18N/de.po with
variables in the string are not displayed correctly.
The email encoding seems ok.

For example:

in /opt/rt3/lib/RT/I18N/de.po line 163-166

#: html/Elements/MyTickets:25
#. ($rows)
msgid "%1 highest priority tickets I own…"
msgstr “%1 mir zugewiesene Tickets mit höchster Priorität…”

The line in HTML looks like that:
10 von mir ausgelösten Tickets mit höchster Priorität

in /opt/rt3/lib/RT/I18N/de.po line 1426-1428

#: html/Elements/SelectDateType:32 html/Ticket/Create.html:167
html/Ticket/Elements/EditDates:45 html/Ticket/Elements/ShowDates:43
lib/RT/Ticket_Overlay.pm:1171
msgid "Due"
msgstr “Fällig”

The line in HTML looks right:

Fällig: ...

/etc/httpd.conf:
<VirtualHost 10.x.y.z>
ServerName hostname.de
CustomLog /var/log/httpd/rt-access_log common
ErrorLog /var/log/httpd/rt-error_log
DocumentRoot /opt/rt3/share/html
AddDefaultCharset utf-8
# this line applies to Apache2+mod_perl2 only
# PerlModule Apache2 Apache::compat

 PerlModule Apache::DBI
 PerlRequire /opt/rt3/bin/webmux.pl

 <Location />
     SetHandler perl-script
     PerlHandler RT::Mason
 </Location>

Anybody has an idea?

Thanks in advance
Torsten