When creating your links to DG, make sure you're linking to http://www.darkgrimoire.com and not just darkgrimoire.com. Effectively you'll now be redirected, but the game no longer sits on darkgrimoire.com. If someone visits that URL, they'll be heaved over to http://www.darkgrimoire.com by the server.
A few things in game require you to use the www to work effectively, and search engines think they are separate sites. By doing a redirect and having you ensure your links are right I can make sure that those things in game that require the right domain don't break, and that google counts all of our links towards the single sites popularity. I really should have done it a long time ago, but didn't really feel the need till recently.