In Office 2007 Microsoft introduced their ribbon toolbar. This completely changed how core fucntionality in Microsoft Office was accessed.
Having used Microsoft Word since version 1, I found my whole world tipped upside down when 2007 was installed on my machine. I'm hope I am not the only one. No longer could I click on various menus to access features I'd been using for 15 years. Suddenly my toolbar was populated with icons, that changed everytime I clicked on something.
My core productivity toolset had changed and after special office and ribbon training, 2 years of using the product, and many robust discussions with colleagues, my productivity has still not increased from the depths it has dropped to.
To add to my despair, the soon to be released Outlook 2010 has also been dressed in the same clothes.
Yes, those users who have not had Office embedded in them over the last 20 years of their professional career will no doubt find their productivity increases as Microsoft tries to make our lives easier, but you cannot teach this old dog new tricks. Just call it a classic menu and I'll be happy.