Things aren't all smooth on the Swedish set of 'The Girl With the Dragon Tattoo.'

Director David Fincher, who earned a 2010 Oscar nomination for 'The Social Network,' is currently working on an American adaptation of the international bestsellers by Stieg Larsson, the Millenium Trilogy.

From Europe, Variety reports, he called his former director of photography Jeff Cronenweth and asked him to take over for 'Dragon Tattoo' because of "differences of opinion" with current D.P. Fredrick Backar.

Cronenweth and Fincher previously worked together on 'The Social Network' and 'Fight Club.' The 145-day shoot was 20 days in when Fincher decided to replace Backar, who'd previously shot shorts and commercials, with Cronenweth.

Backar, Variety reports, was "startled" to get the job on 'Dragon Tattoo' in the first place, because Fincher usually works with big-name D.P.s. Cronenweth was nominated for Best Cinematography in 2010 for 'The Social Network.'

Fincher's familiarity with Cronenweth has supposedly eased the shoot right along.

In conclusion: whew.

'The Girl With the Dragon Tattoo' is set for release on Dec. 21, 2011.