Escalated to Bugzilla from IssueTracker
Created attachment 115560 [details] proposed patch The patch removes the comparing of ports in the reply cache which makes the cache more tolerant to rpc message on different tcp connect but with the same xids...
A fix for this problem has just been committed to the RHEL3 U7 patch pool this evening (in kernel version 2.4.21-37.5.EL).
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 the 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/RHSA-2006-0144.html