RT-2.0.1: System error

System error
while serving ticket.aquanta.com /Ticket/Attachment/1713/185/webalizer.README
error while executing /Ticket/Attachment/dhandler [standard]:
Bizarre copy of HASH in aassign at /usr/lib/perl5/5.6.0/Carp/Heavy.pm line 79, line 175.

backtrace: /Ticket/Attachment/dhandler [standard] <= /autohandler [standard]

Can someone help me with this error? I get this error when opening an attachment on a mail.
Thanks,
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