LinkButton “Click” inside an UpdatePanel does not trigger a partial update.

VS 2012, Windows server 2008, .NET Framework 4.5, IIS 7.5

Hi everyone,

I have a Gridview with LinkButtons (as TemplateFields), inside an “UpdatePanel”. My issue is that the LinkButtons are no longer causing an asynchronous postback when clicked. This is only happening in IE. Strangely enough Firefox and Chrome work fine and a partial update of the content inside the UpdatePanel takes place.

It is also important to mention that this issue is only seen on servers with .NET Framework 4.5 installed. I have tested the same scenario on a windows 2008 server with .NET Framework 4.0 and the LinkButtons do trigger a partial update as expected.  Does anyone know about any issues related with .NET Framework 4.5 and asynchronous postbacks using IE?

Thanks