It seems like ASP.NET 4.0 is not prepared to handle ImageButton events triggered by Internet Explorer 10. The problem is that IE10 sends the image click coordinates as doubl
Actually is a different issue than the ones listed by tkrause. There is a hotfix available, although I can't figure out how to apply it. Here is info for those that do know how to apply these:
http://support.microsoft.com/kb/2784147
If you check the ASP.NET section is has the exact error stated in this question. This is the exact error and issue I am having also.
I think I cannot get the update because I'm using Server 2003. I'm using ASP.NET 3.5 and VS 2008, so upgrading to 4.x isn't an easy option for me.