Are these kind of errors valid and how can I resolve. Doesn't HTML5 allow this code?
<button title="" disabled="disabled" >>></button>
Validation: (HTML5) - the values permitted for this attribute do not include 'disabled'
Check Web Standards Update for Microsoft Visual Studio 2010 SP1 that improves html5/css3 validation and intellisense support.
disabled is a valid html5 property for button. However, you should always specify type on buttons, as different browsers use different defaults. Validation may be reporting that omission in a roundabout way.