There are a number of related threads already, but I'm struggling to find one that answers my problem. I have a RadioButtonList with AutoPostBack enabled and they sit within an UpdatePanel. However, in IE10 (only), clicking one of the options causes the javascript error; '__doPostBack' is undefined. From carrying-out some research it seems that this is due to Microsoft's ASP.NET framework not being compatible with Microsoft's latest browser. Not sure why all the other browsers just work and yet Microsoft's own browser doesn't... but lets face it, if you work with ASP.NET you've probably already given-up with IE anyway. A lot of the threads point to some hotfixes, but having struggled to identify which was the correct one for my server, I actually worked my way through all the 64-bit versions, requesting a hotfix email, waiting for the email, downloading the file, uplaoding it to my server, extracting it, and eventually running it... only to be told by every single one I tried that it wasn't relevant to my operating system. I then tried somebody else's suggestion about putting an updated ie.browser file in the App_Browsers folder... but that had no effect. So... can somebody please tell me how I can make my ASP.NET application work in Microsoft's IE 10 browser??? Just one fine note, I can make it work by removing the OnSelectedIndexChanged and AutoPostback from the RadioButtonList and instead using a button to submit the form, but this is a timed-quiz compontent and thus clicking an option to do the post-back is much preferable and has worked perfectly for a number of years before Microsoft decided to unleash yet another IE browser abomination on us. Can somebody please end my misery before I turn to PHP!
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