Hi all, I upgraded OTRS 2.3.3 to 2.3.4 and found that when $Self->{DefaultCharset} is set to 'utf-8', the SysConfig area of the Admin interface results in a 500 server error. Apache error logs show the following: [Sun Mar 01 17:45:56 2009] [error] [client xxx.xxx.xxx.xxx] [Sun Mar 1 18:45:56 2009] index.pl: utf8 "\\xF6" does not map to Unicode at ../..//Kernel/System/Config.pm line 161, <$In> chunk 1., referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:56 2009] [error] [client xxx.xxx.xxx.xxx] [Sun Mar 1 18:45:56 2009] index.pl: utf8 "\\xFC" does not map to Unicode at ../..//Kernel/System/Config.pm line 161, <$In> chunk 1., referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:57 2009] [error] [client xxx.xxx.xxx.xxx] [Sun Mar 1 18:45:57 2009] index.pl: utf8 "\\xE4" does not map to Unicode at ../..//Kernel/System/Config.pm line 161, <$In> chunk 1., referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:58 2009] [error] [client xxx.xxx.xxx.xxx] [Sun Mar 1 18:45:58 2009] index.pl: utf8 "\\xFC" does not map to Unicode at ../..//Kernel/System/Config.pm line 161, <$In> chunk 1., referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:58 2009] [error] [client xxx.xxx.xxx.xxx] [Sun Mar 1 18:45:58 2009] index.pl: Malformed UTF-8 character (unexpected non-continuation byte 0x67, immediately after start byte 0xfc) in subroutine entry at /usr/lib/perl/5.8/Data/Dumper.pm line 179., referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:58 2009] [error] [client xxx.xxx.xxx.xxx] *** glibc detected *** free(): invalid next size (normal): 0x095c6590 ***, referer: https://otrs.host/path/index.pl?Action=Admin [Sun Mar 01 17:45:58 2009] [error] [client xxx.xxx.xxx.xxx] Premature end of script headers: index.pl, referer: https://otrs.host/path/index.pl?Action=Admin Changing the default charset to iso-8859-1 the problem goes away. Any ideas? We need UTF-8. Reverting to 2.3.3 resolves the issue as well with utf-8. Best wishes, Paul