Problem since upgrade to 2.0 "Error: Session state protection violation"

I've upgraded to 2.0. Everything fine except one particular page when I submit it I get "Error: Session state protection violation". I have read up about session state protection, and it is turned off in my application. There are no items, pages or URLs that have any session state protection. There is nothing particularly different about this screen when compared to other screens that work. What can be causing this?
Steve

Steve - Thanks for putting that test case out there. This is an odd bug. It happens when you apply the read-only attribute to a "Display as Text (does not save state)" item. Normally, these items are not HTML input items on the page (you see only the value rendered). However, because of a bug, applying the read-only attribute causes an INPUT item to be created. This leads to the problem that you saw -- when an item that should never be POSTed because it is: a) an application item, b) a page item that has the Session State Protection attribute "Restricted - May not be set from browser", or c) a page item of display type "Display as Text (does not save state)", is POSTed, the Session State Protection violation is detected and reported. These checks are performed whether the Session State Protection feature is enabled for the application or not. The reason for that is that checking for cases(a) and (c) is always legitimate and checking for case (b) is always necessary because the Restricted attribute for page items of qualifying display types is always in effect.
So the workaround in your case is not to use the read-only attribute for the display-only items. They are read-only anyway.
Thanks again for pointing this out.
Scott

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