In testing our application on 1.8RC2 we occasionally get an error stating the user session has expired. I set up a load test of 10 users consistently over 5 hours and found that this does seem to occur intermittently.
I plugged 1.7.2 back into the application and re-ran the same load test and never see this expiry problem. Does anybody have any ideas what could cause this? Do I need to change some configuration?