After a lot of searching and hair pulling I have tracked down what seems to be a real deal breaker issue with a lot of rad controls especially radgrid, sorry for the vagueness of this post but it has been a long few days of deadlines :)
The problem is particular to IE11 and it is not just related to it being in preview.
It is discussed at http://msdn.microsoft.com/en-us/library/ie/ms536343(v=vs.85).aspx
In this post it says:
is no longer supported. Starting with Internet Explorer 11 Preview, use addEventListener
. For info, see Compatibility changes
Binds the specified function to an event, so that the function gets called whenever the event fires on the object.
So it seems that until there is an update to the core way rad controls handle mouse clicks they will not work even on IE final.