Signs of trouble at Microsoft?

Late last night Microsoft announced that it would delay shipping the highly anticipated Vista operating systems for consumer use until after the holiday season.  That was pretty surprising, given that all indications were for Vista to be selling in time for Christmas ‘06.  Apparently this delay has also forced the hand of Steve Ballmer to do an internal re-org, and place a long time Office division veteran on top of the Vista hierarchy.  The WSJ is reporting the details here.