When there is no background color specified in any ancestor, execCommand('backColor') crashes WebKit.
This is a regression from r66431 and major blocking bug for Chromium dev release. It affects hotmail.com and should be fixed promptly.
Created attachment 66297 [details]
Very embarrassing regression. The loop was missing a null check.
Comment on attachment 66297 [details]
Committed r66624: <http://trac.webkit.org/changeset/66624>