bugzilla.redhat.com keeps asking me for my username and password before every operation requiring a login. I am specifying the correct ones each time. I have java, javascript and cookies all enabled in my browser, and my ~/.netscape/cookies file does contain bugzilla cookies. I have never seen this problem before. I suspect that there is something wrong with the bugzilla server.
I just quit and restarted netscape to see if that was the problem, and it does not appear to have helped. Viewing this bug, I see "Login: jik.ma.us" in the header bar, but there's no link, e.g., to allow me to add an attachment to the bug, which suggests that bugzilla doesn't think I'm logged in as the user who created the bug.
Please try quitting Netscape completely. Then edit ~/.netscape/cookies and remove all instances of the lines that contain Bugzilla_login and Bugzilla_logincookie. The re-run Netscape, connect to Bugzilla and re-login. Please let me know if this fixes the problem for you.
*** This bug has been marked as a duplicate of 9598 ***
This still seems to exist in the 5.0.x branch. The resolution for me was to only use / in the "Cookiepath" in the "Required Settings" as the /bugzilla/ would cause you to keep logging in to every "Admin" link and whenever you clicked the save button. I will continue to test this.