As Microsoft gears up to release the next version of Office sometime late next year, the company is facing a problem: most of its customers still haven't upgraded to Office 2003, the most recent version of the suite. The Register reports that just 15% of PCs are running Office 2003; Microsoft likes to have at least 50% of customers up-to-date before shipping a new version. Microsoft plans to address this with a marketing blitz, as well as a campaign to get third party developers to release and promote add-ons for Office 2003. The big problem, of course, is that most users haven't felt a compelling need to upgrade. "There are hundreds of millions of people who have been using this product for three to five years and if they haven't discovered the stuff they need to do what they need by now, then you can't hit them in the face with it,"analyst Paul DeGroot told the Register. Microsoft may also want to reconsider its pitch: somehow, it doesn't seem like calling your customers dinosaurs for running three-year-old software is really the best way to get them to upgrade.