Here some findings while testing 18.104.22.168 beta version. Maybe more later.
1. Properties of the Top Journals Folder: Can’t edit Item Name and Created On (always 2004-07-13 15:13) fields
2. Documents section: I can’t hide the horizontal and/or vertical ruler
3. Calendar: Tasks are shown with category, like: Testing task [Personal] I would rather see the task with the background color of the corresponding category.