I sent a paper in for peer review to the journal "General Relativity and Gravitation" 30/10 2011. On 12/11 2011 they sent it out for peer review. Then 5/12 2011 they sent it out for peer review again, obviously one of the referees could not make up his mind or something so they sent it to a third guy. I have not heard anything since, and on Friday the paper have been on peer review for two months. Would it be rude of me to contact the journal and ask them how things are going? I am guessing that two months on peer review without coming to any preliminary conclusion is slightly longer than usual. I am making some rather strong claims so I can understand if they want to do some extra verification for that reason.