Apologies if this is old news, I have looked but couldn't find any references to this.
BBC news reporting that the 1st flight of the Dreamliner is being delayed by 3 months due to problems with software and is "battling to complete parts of the plane at its plant in Everett".
http://news.bbc.co.uk/1/hi/business/6980299.stm Apparently they are keen to "avoid a repeat of the catastrophic problems suffered by rival Airbus, whose A380 superjumbo was about two years late. "