By the way, I believe this problem is related to a bug listed at bugzilla - http://nagoya.apache.org/bugzilla/show_bug.cgi?id=3160 which was (I believe incorrectly) classified resolved invalid probably because the explanation is not very clear. I contacted the original poster of that bug and found that he had not sucessfully corrected the problem, and Pier's response to that bug does not seem to work considering the fact I mentioned in my first post on this thread that my coworker used the exact same files as I did.
Pier, could you take a second look at the above bug in light of the observations I made in my post yesterday related to this issue? Also, could you clarify the advice you gave to replace the warp.jar distributed with Tomcat? I don't understand how rebuilding mod_webapp.so can affect the contents of a jar file, unless I am grossly misunderstanding something. Thank you for your time, Geoff