Act 2012 Web Edition - Return to Login Screen when clicking around application.

[443dds]

Among other times, I can consistently reproduce an issue in my new Act 2012 Web edition where I login as Administrator, then click on Contacts, and it brings me back to the login screen.

Windows event log shows:

SOURCE: Act.WebMESSAGE: Object reference not set to an instance of an object.FORM: QUERYSTRING: entity=Contact&id=ea579b5c-583c-4601-b432-e553a2299964TARGETSITE: Void HistoryTab_PreRender(System.Object, System.EventArgs)STACKTRACE:    at Act.Web.HistoryTab.HistoryTab_PreRender(Object sender, EventArgs e)   at System.EventHandler.Invoke(Object sender, EventArgs e)   at System.Web.UI.Control.OnPreRender(EventArgs e)   at System.Web.UI.Control.PreRenderRecursiveInternal()   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)REFERER: http://actserver.corp.local/APFW/contacts/contactDetail.aspx
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

My users say they get it randomly throughout their day working within Act.

Any ideas?

[KeystrokeMike]

I'm also getting this error on a ACT v16 deployment. Only seems to happen with the one user and only happens when accessing the detail view of any contact.