I recently purchased a book from Amazon for Kindle for Mac. I have the most recent version of the app. I like to highlight and take notes when I read. So, I very much like this feature in the new Kindle for Mac release. I began having problems. Sometimes, the app would crash. Eventually, it got to the point where I can't even open the book at all or the app will crash. Other books open fine. Now, if I remove the *.mpb file in "My Kindle Content" associated with this book, I can open the book fine. But, when the app syncs to the Amazon server and re-downloads an update of my bookmarks, notes, and highlights, the app crashes. The interesting thing is that I also have the Kindle app for my iPhone and that works just fine with all of the bookmarks, notes, and highlights. So I 'm wondering if the Kindle for Mac app has a bug when loading in the bookmarks, notes, and highlights - especially after they are a certain content size. Has anyone else experienced this problem?