Package review of the new tcsh617 package including a patch for this bz was successful. See bug 688166.
*** Bug 583075 has been marked as a duplicate of this bug. ***
Bugfix was successfully verified on tcsh617-6.17-5.el5 package using automated test case.
Technical note added. If any revisions are required, please edit the "Technical Notes" field accordingly. All revisions will be proofread by the Engineering Content Services team. New Contents: Previously, running tcsh in verbose mode caused the shell to append history to its output on exit. This new package fixes the issue and tcsh now works as expected.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2011-1072.html