Logs say the following

[Wed Apr 17 11:31:57 2013] -e: Version string '-1, set by base.pm' contains invalid data; ignoring: '-1, set by base.pm' at /opt/otrs//Kernel/System/Log.pm line 166.
ERROR: OTRS-CGI-10 Perl: 5.10.1 OS: linux Time: Wed Apr 17 11:31:57 2013

 Message: Need Filename!

 Traceback (25299):
   Module: Kernel::System::Web::UploadCache::DB::FormIDAddFile (v1.24) Line: 68
   Module: Kernel::System::Web::UploadCache::FormIDAddFile (v1.24) Line: 153
   Module: Kernel::Modules::AgentTicketActionCommon::Run (unknown version) Line: 418
   Module: Kernel::System::Web::InterfaceAgent::Run (v1.64) Line: 868
   Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 46
   Module: (eval) (v1.90) Line: 204
   Module: ModPerl::RegistryCooker::run (v1.90) Line: 204
   Module: ModPerl::RegistryCooker::default_handler (v1.90) Line: 170
   Module: ModPerl::Registry::handler (v1.99) Line: 31

ERROR: OTRS-CGI-10 Perl: 5.10.1 OS: linux Time: Wed Apr 17 11:32:04 2013

 Message: Invalid Challenge Token!

 Traceback (25299):
   Module: Kernel::Output::HTML::Layout::ChallengeTokenCheck (v1.381.2.13) Line: 1117
   Module: Kernel::System::Web::InterfaceAgent::Run (v1.64) Line: 417
   Module: ModPerl::ROOT::ModPerl::Registry::opt_otrs_bin_cgi_2dbin_index_2epl::handler (unknown version) Line: 46
   Module: (eval) (v1.90) Line: 204
   Module: ModPerl::RegistryCooker::run (v1.90) Line: 204
   Module: ModPerl::RegistryCooker::default_handler (v1.90) Line: 170
   Module: ModPerl::Registry::handler (v1.99) Line: 31

ERROR: OTRS-CGI-10 Perl: 5.10.1 OS: linux Time: Wed Apr 17 11:32:27 2013

We have not done any changes, but function works fine on other actions (email, phone, etc)

Any ideas will be appreciated.

Best Regards.