During Activision Blizzard's investor relations call earlier today, Blizzard boss Michael Morhaime revealed that subscriptions for the hugely successful MMO have dropped to 10.3 million active subscribers for the end of the company's fiscal third quarter. Approximately 800,000 users have walked away from the WoW universe during the period, based on Activision Blizzard's fiscal second quarter investor relations call, where Morhaime noted subscriptions for the game had dipped to 11.1 million.

Though Blizzard doesn't divulge forecasts on "subscribership levels," Morhaime noted that "the majority of the declines were in the east." Morhaime added that China still represents "more than half" of World of Warcraft's global player base.

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Activision Blizzard's fiscal third quarter report reveals the company has posted revenues over $100 million more than it has originally estimated in its outlook for the period. The quarter, which ended September 30, saw the publishing giant post revenues of $754 million, up from $745 million during the same reported period last year. Activision Blizzard had originally set its outlook for the quarter at $650 million.

Fifty-seven percent of Activision Blizzard's total revenue came from digital channels, totalling another record $427 million for the company, up from $363 million the same period a year ago. For a major contributor to the increase, we suspect we need not look any further than Call of Duty: Black Ops, which Activision Blizzard called "the [number one] best-selling title in dollars in aggregate across all platforms in the U.S. and Europe for each of the first three quarters of 2011."

Read more: Activision Blizzard 2011 outlook increased to $4.33B »