I've been debugging a problem on this thread at the DNN site... http://www.dotnetnuke.com/Community/Forums/tabid/795/forumid/118/threadid/234411/scope/posts/Default.aspx

 

 

Users were being logged out any time they left the Home page to any other page on the site.  I traced the problem back to Flashboard and a line in ViewFlashBoard.ascx.

 

By adding the PortalID to the query string, the issue was resolved.

 

   <iframe  id="flashboard" src="<%=me.ResolveClientUrl("flashboard.aspx")%>?moduleid=<%=Me.ModuleId%>&portalid=<%=Me.PortalId%>" width="<%=Width%>px" height="<%=Height%>px"  hspace="0" marginheight="0" marginwidth="0" vspace="0" scrolling="no" frameborder="no"></iframe>

 

I don't see the problem happening on your site, but I can reproduce it consistently on mine.  I may be related to child portals which I am using, but I haven't test that yet.

 

Thanks,

Rob