[otrs] What does this strange message mean?

ERROR: OTRS-PM3-10 Perl: 5.8.8 OS: linux Time: Tue Sep 26 20:42:02 2006 Message: Need Search, UserLogin or PostMasterSearch! Traceback (3217): Module: Kernel::System::CustomerUser::DB::CustomerSearch (v1.36) Line: 116 Module: Kernel::System::CustomerUser::CustomerSearch (v1.22) Line: 154 Module: Kernel::System::PostMaster::NewTicket::Run (v1.52) Line: 114 Module: Kernel::System::PostMaster::Run (v1.52) Line: 239 Module: main::FetchMail (v1.17) Line: 198 Module: /opt/otrs//bin/PostMasterPOP3.pl (v1.17) Line: 126