You change the GUI a little (such as OOo), people can't handle it.
I have to disagree with the theory that people can't handle it if you change the GUI. Have you seen the menus in Office 2007? Its a mess the toolbar has been redone so much that its like using different programs. In my opinion there is no difference between switching from Word 2003 to Word 2007 as it would be to switch from Word 2003 to Open Office Write or even Abiword. I believe that people aren't so much afraid of a different interface as they are to go against the mainstream. [/quote]