[otrs] UTF-8

Hi list, a lot of our customers receive Mail delivery errors from OTRS: [...]

Malformed UTF-8 character (unexpected non-continuation byte 0x72, immediately after start byte 0xfc) in substitution (s///) at /opt/otrs/Kernel/System/Ticket/Article.pm line 100. Malformed UTF-8 character (unexpected non-continuation byte 0x72, immediately after start byte 0xfc) in substitution (s///) at /opt/otrs/Kernel/System/Ticket/Article.pm line 100. [...]

Is there any way to tell OTRS to not send this kind of error reports ? The mails are delivered to OTRS. Thanks and regards Sascha