If you are using Google Chrome as your default Web browser in Windows, clicking the "Print" button on the "My Notes" window will display an alert box saying "undefinedoops", and the highlights and notes will not be visible. This is due to a known security limitation in Chrome.
Copy the link in the browser address box and paste it into another browser. Firefox, Safari, and Internet Explorer will display the notes properly. (On IE, you will also have to click the message to allow blocked content. This is safe to do.)