Trying to get DR? Don't like BitTorrent? Go here, assuming you've already got Catacombs installed:

http://mythic.fileburst.com/downloads/catacombs_to_darkness_setup.exe (Don't forget that you need to "buy" the expansion from your billing window after you've logged in, so that you can see the expansion.)

ATI card user with Darkness Rising? Crashing when you try to see the new Camelot City? Get the information to fix the problem here: http://support.darkageofcamelot.com/kb/article.php?id=837

EDIT: A Team Lead sent this handy Uninstaller Seeker: Go to http://support.ati.com - search for "catalyst uninstaller" (using the quotes) - towards the bottom of the page you'll see a link to CATALYST - ATI Maintenance Utilities - clicking that takes you to the uninstaller page.

Not an ATI card user, and having other issues? We are working on technical articles for you, but the first step is to make sure you've got the latest version of DirectX running, and the second step is to make sure you've installed the latest drivers for your specific cards.