I am getting this when trying to install OTRS 2.0.4 (debian) on a test machine.
 
ERROR: OTRS-CGI-10 Perl: 5.8.8 OS: linux Time: Thu Feb 28 15:15:06 2008

Message: Access denied for user 'otrs'@'localhost' (using password: NO)

Traceback (31050):
   Module: Kernel::System::DB::new (v1.47) Line: 168
   Module: Kernel::System::Web::InterfaceAgent::Run (v1.8) Line: 150
   Module: ModPerl::ROOT::ModPerl::Registry::usr_share_otrs_bin_cgi_2dbin_index_2epl::handler (v) Line: 47
   Module: (eval) (v1.80) Line: 203
   Module: ModPerl::RegistryCooker::run (v1.80) Line: 203
   Module: ModPerl::RegistryCooker::default_handler (v1.80) Line: 169
   Module: ModPerl::Registry::handler (v1.99) Line: 30
 
Andrew Meyer
Unix Systems Analyst
314-787-0681  x39
314-565-0868