Using MS CRM 2011(rollup 12) I found out that crmForm.all.name.DataValue does not work anymore in IE 10. After setting compatibility mode for the site the DataValue property worked again. Keep this in mind if you haven’t upgraded your javascript code to use the new api and you want to use IE 10.
EDIT:
Oguz Kaan Akyalçın pointed out the HTC option, apparently turning it off and on again and then close IE 10 does the trick as well.
