Used to be (Tomcat 4) that if you tried to install an error-page for code 401, the user would see the page without being prompted to log in. There were workarounds, but the behavior was considered a bug in Tomcat.
Now I find that in Tomcat 5.5(.9) that a 401 error-page is simply ignored -- no matter what I do, it doesn't appear, ever. I have a 404 page working fine. Does anyone have any info on this? Is this the expected behavior now?