This function has not been fully integrated into the long-term Mathematica system, and is subject to change.
InitializationCellWarning is an option for notebooks that specifies whether a warning should be given when a notebook containing initialization cells is opened.
With the default setting InitializationCellWarning->True, a warning in the form of a dialog box is given, asking the user to choose whether the initialization cells should be automatically evaluated.
In order for the warning not to occur, this option must be set to False both in the notebook being opened and at the global level. This is a security feature to prevent a notebook from silently evaluating cells without the user's knowledge, unless the user has specifically enabled this by setting the option to False at the global level.
