Hi Pol,
I think its a case of ACS not being able to connect to the database. Checkout the log file especially during the startup of the aolserver. What I think you are seeing is coming from the request processor RP. All page in ACS/OACS must passby the RP. Since I think (not sure) RP gets some data in the db per request like matching the session to important vars like user_id.
Anyway its been a while since I have touched ACS 3.x but I think there is a good chance on what I am saying maybe valid. Some other community member may confirm this.
