This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Does a URL or "/j_security_check" or "/closed/*" get called? If you aren't sure, you could check the logs or have a filter with "/*" output all the URLs it sees. My guess is you are relying on j_security_check and a slightly different URL is getting called.