Could be an older copy of DBM, or DBM is still not corrected.

When the instances were being made Kronus was the original name of the mob but it was renamed to Loken.

I believe they changed it in a patch.

http://www.wowwiki.com/Loken for more information.

Loken is also referred to as Kronus by the earthen from Ulduar, and a few other quests, which is a reference to Cronus, the first Titan of Greek mythology and father of several deities of the Greek pantheon. This may be an alternate name or a leftover from the Alpha, before his name was finalized.