If you’re using Adobe Acrobat 8 (Standard or Professional), you will likely be prompted to install an update to version 8.1 released over the weekend by Adobe. It’s a worthwhile update but make sure you have a few minutes free – it took more than ten minutes to install on my speedy desktop computer. If you’re not prompted automatically, you can install it manually from this page.
The update significantly improves Acrobat’s compatibility with Vista and Office 2007, and includes a fair number of bug fixes – it looks worthwhile for Windows XP and Office 2003 users also. This page has more details on the specific issues addressed by the update.