We store two objects in session. Somehow, one of the objects from another user got loaded into a different user\'s session. The user should have had no access to this partic
How many times did it occur? Did you check for users using browser back or sending links to each other with session ids?
One way to check for sure about State Server bug is to switch to another session manager, fallback to in-proc if you can or use SQL Server but would be better to find a way to reproduce the bug it first so you could test it.