While using the latest Chrome and Safari browsers on Windows 7, I've noticed that I get "NoSuchConversationException: No conversation could be found with id ... -- perhaps this conversation has ended?. Maybe it's just my observation, but it appears that this doesn't happen on Firefox browser or at least on as often that I've noticed. This issue pops up while working with the existing reports, going back and forth between different pages. Pretty much using the JasperServer GUI as a normal user would use. This error happened during our tool presentation and was kind of embarassing. Jasper Server v4.5 is running on CentOs 5.
Please note this has nothing to do with session timeout, since it happens while using the tool.