Has anyone come across this issue? I have required field validation on a form that I have tested and know works in IE 7-9, Firefox and Chrome but in IE 10 it allows the form to submit without doing any validation. The site is in .Net 3.5. I have done some research online but I can't find anything about this.
Most probably support.microsoft.com/kb/2608565.
Which means that your old browser capabilities settings incorrectly recognize ie10 as a browser which doesn't support javascript (which of course is not true). The updated browser capabilities file corrects this problem.