Chessvibes.com reported,
Two matches have not been played: Iweta Rajlich - Jovanka Houska and Arianne Caoili - Ju Wenjun. From the latter we know that Caoili didn’t have time to play chess in this period, but strangely enough she was paired anyway – we can only assume that a cancellation letter wasn’t received in time. About Rajlich the official website reports that she was traveling with her husband and new-born kid, but was stopped by the weather conditions.
If you've forgotten about the new format of the Women's World Championship, with matches and knockouts in alternate years, see one of my previous posts on the subject: 2009-2010 Women's Grand Prix.