Selection.collapseToStart() and Selection.collapseToEnd() should throw INVALID_STATE_ERR if no selection is made.
This would cause us to pass the following test on IE Test Center:
Created attachment 65396 [details]
Do these raise an exception in Firefox?
Raising exceptions where we didn't use to can be a significant compatibility issue, because if any page depended on the old behavior, it often stops working completely.
(In reply to comment #2)
> Do these raise an exception in Firefox?
No, only IE9 implements this behavior so far AFAIK.
Comment on attachment 65396 [details]
Clearing flags on attachment: 65396
Committed r66590: <http://trac.webkit.org/changeset/66590>
All reviewed patches have been landed. Closing bug.