Yep, this is happening to me as well. I cannot even write one word without "paste" popping up. When there is nothing in the clipboard I experience the same disappearance while writing. I just received my Jot Script today and was very annoyed that I have to yet wait for another update before I can utilize this technology in my workflow. The whole idea of a fin point stylus is to be able to write in smaller spaces, which is impossible in Penultimate. The stylus works very well with several apps which do not even utilize the Script SDK (such as Noteshelf). I am looking forward to penultimate getting on board, or Evernote seeking a new developer to partner with.