Yes, the same problem and a little more of erratic behaviour i open a pdf to annotate by clicking the skitch icon available in the pdf doc, not top right firstly, it behaves erratic, sometimes it opens in the builtin skitch and sometimes in mac Preview app (which means u can't edit in skitch) i keep clicking the skitch icon few times, it keeps opening in Preview and then randomly would open in skitch i then annotate a 15 page pdf, then click the cross mark on top left to close and save i get a pop up - unable to save pdf closes, all annotations lost sometimes is able to save with annotations