I have used open goo and several installations of the various versions in the past. I have installed a new installation and for some reason it is not showing all the tabs at the top like Notes EMail Calendar Documents, its only showing Overview. I started with 1.5.3, tried with 1.6rc and then went to 1.6 Beta 2 all with the same results. I have on another server 1.6 Beta 2 installed and in use and is working as expected. This new install with all these various versions tested, I have not tabs but Overview.
I have a standard CentOS 5.2 Server
Apache 2.2.3
PHP 5.1.6
MySQL 5.0.77
OpenGoo 1.6 Beta2
I am getting no errors from the logs or any displayed from the site.