On a fairly big ASP.NET project, and have started getting this odd problem on just one ASP.NET page.
A custom user control, on postback causes a 403 error to be thrown. In internet explorer, the error pages suggests that the server may require logging in. In firefox, a blank page, except for the text "Object has moved here", with a link to the page (the same address) appears. I have coded the authentication myself, and know that this is nothing to do with the application code.
After the postback, manually refreshing the page results in the page loading with no problems.
Has anyone come accross this odd problem before or can suggest what it might be?
Thanks very much.