Two-step authentication seems to break compatibility with my Sony PRS-T2 ebook reader. The device includes a built in Evernote client which worked fine. It's used for synchronizing data and to save links or text snippets. Now I was trying to access Evernote for sending a link from within an ebook. I got a "account not setup" message. When I was trying to setup my account, I always get an "user name or password invalid" error. My login data is correct, I just verified with it the web interface. So what's going on here? Does two-step authentication breaks old apps? From this thread I got the conclusion that old apps should still work. Is there any workaround available?