Create a contenteditable div and set the contents to:
Place the cursor at the start of the span and press enter. The div now contains:
There shouldn't be a block <div> element inside an inline <span> element. See comments 10 and 11 on bug 62621 for more details.
Created attachment 97377 [details]
Comment on attachment 97377 [details]
Clearing flags on attachment: 97377
Committed r89145: <http://trac.webkit.org/changeset/89145>
All reviewed patches have been landed. Closing bug.