Hi, We've been running 2.3.3 installed via rpm. We hadn't modified the core files so I didn't expect the upgrade to 2.3.4 (also using the rpm) to cause any real issue like moving from 2.2.x to 2.3.x. Now when logging in at either the customer or agent interface, the result is a blank page. The log shows successful authentication and I can't find any errors in the log. A few months back on the list someone had a similar issue but they were going from 2.2.x to 2.3.x. They mentioned using the older AuthSession.pm file from 2.2.x. I tried that and interestingly, the customer interface started to work again but no luck with the agent side. In that thread they mentioned the root cause is something was different with the Config.pm file format and the best action is to rebuild it. I have no problem with doing that except I don't know what I'm trying to avoid when I rebuild the file. Thanks for any help!! Terrill