How to fix iTunes Window Maximize

Recently I found an issue with iTunes 9. When you move from a larger external display on my MacBook to the laptop display that I was unable to fit the window to the screen using the maximize or + button.  Instead  of fitting the window to the screen, it would switch to mini-player mode.

 To fix this run this from your command line:

 defaults write com.apple.iTunes zoom-to-window -bool YES

 To switch to mini-player mode now, hold option and click maximize.