Been working fine for me all along, I use it often. May sound silly, but are you sure you got the right url? There are several out there, this one worked for me just right now...
http://www.rcdb.com/
Favorite Wood Coasters: The Voyage, Ravine Flyer II, Thunderhead, Balder
Favorite Steel: Steel Vengeance, Expedition GeForce, Olympia Looping
Parks visited: 222, Coasters Ridden: Steel: 822, Wood: 178, Total: 1000