I finally just gave up on 6.11 GA. The previous release was awful as I do a lot of copy / paste from Outlook to Evernote. Paste would go to the bottom of the page and not where the curser was, Typing would do the same... I finally uninstalled and went back to 184.108.40.20693 that I had on my laptop. It does what I need.
I will chime in with the others, I hate the new PDF view. I love the view in 5.8.5. If the viewer is the issue as I have read mentioned, why not just allow the PDF to be opened by the installed PDF viewer on the PC?
I miss some of the features in 6.11, but not enough to suffer thru the things that make my work more difficult.