I am getting an "Invalid postback or callback argument" error that only occurs in Firefox and only on my web host's server.
I am using master pages and I am AJAX-enabled. I have a gridview in an updatepanel that has paging and sorting enabled. When I click on the gridview to display the next page it generates this "invalid postback" error.
I verified that I am not enabling EventValidation either on the page or in my web.config. I think the error might have something to do with Firefox's caching, because the problem does not occur in Internet Explorer. It works great in IE.
So, it works in Firefox and IE on my local development machine but it throws an error in Firefox only on my host's web server.
Anyone have idea what may be causing this?
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