Please, Microsoft. No upgrades

The change from Office 2003 to 2007 broke all my Powerpoint presentations. Old templates and macros didn't work. Text got randomly resized. Callout boxes pointed to the wrong things. I can never just borrow slides from older presentations -- I need to inevitably edit the stuff. And now, just when I thought I'd caught up, Microsoft is releasing the beta of Office 2010. Yikes! Enough already.