The test results you have selected are very old and may not represent the current state of Wine.
Selected Test Results (selected in 'Test Results' table below)
Installation, registration, sync with Kindle store, download new ebook, reading an ebook, changing viewing preferences, full screen, dictionary lookup.
What does not
Exit from full-screen not perfect. When try to exit, the program fails to re-acquire window decorations, and remains almost, but not quite, full-screen size. This could just be a window manager issue, too.