We like to say that the true enemy of innovation is "precedence", but Roger Martin and Jennifer Riel have some good points in this BusinessWeek article.

href="http://www.businessweek.com/magazine/content/10_04/b4164080555772.htm" target="_blank">http://www.businessweek.com/magazine/content/10_04/b4164080555772.htm

What other "enemies of innovation" have you identified and documented?