As far as the handshake, I'm not sure I was in and out of the match and only saw the end of the tiebreaker in the third. There was some fan? boyfriend? who kept yelling really loud and was getting on Jarka's nerves. Jarka seemed to believe that Naomi knew this fan and had encouraged them to do it, but Jarka's Jarka. Jarka and Naomi seemed to have a few words after the match and a bit of a staredown. It is the WTA after all, and this is part of why I love it!
Jarka did congratulate Naomi on twitter though, complimented her serve and wished her luck in her next match, so I don't believe there's any actual aniomsoity between them. Things can get blown of out proportion on court, especially in a close three set match.