In Release Notes (Revision 6.2.3-1) in section 4.1. Bug Fixes in description of 1085504 - The NegotiationAuthenticator loses post data there is "then the" used twice in "..., then the then the NegotiationAuthenticator would lose...".
Fixed typo in release notes for Bug 1098999.
Can be verified here: http://documentation-devel.engineering.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/6.2/html/6.2.3_Release_Notes/index.html JBoss_Enterprise_Application_Platform-6.2.3_Release_Notes-6.2-web-en-US-6.2.3-3.el6
Verified on docs-stage. Revision 6.2.3-3