I'm not a big fan of the People Hub view in Outlook 2013's contacts. It's too cluttered, it's confusing. While you can edit contacts in the contact cards, it supports only the main contact fields. If you want to edit the contact photo and add (or open) attachments, you need to open the full contact.
I think every release of Outlook had at least one printing bug slip though the beta testing phase because so few people print calendars and Outlook 2013 kept up the tradition. This time around, the bug is with the Calendar details style: Appointments are duplicated in the print out.
As everyone probably heard by now, Office 2013 was finally released to the general public. Corporations with volume licenses have had access for several weeks, as have MSDN/TechNet subscribers, so it's somewhat of an anticlimax release.
A number of features were removed from Outlook 2013. Some features, like Suggested Contacts, were hated by users, others, like the To-Do Bar and Windows Search, were replaced by a less functional feature (Pinned Peeks) or removed completely.
If you want live tiles for your email, you'll need to configure the Mail and Calendar apps.
How to completely uninstall Office 2013, including the orphaned Mail applet.
Outlook 2013's Reading Pane Compose lets you compose replies and forwards in the reading pane. To always have the Reply and Forward buttons open a new window, edit the registry.
The most frequently asked question to date is how to change the interface color. Outlook (and all of the Office apps) are so… white. The RTM builds adds gray color options.
Under certain conditions, Exchange server users testing Outlook 2013 discovered that emptying the Deleted Items folder deleted everything in the mailbox.
An introduction to some of the features in Outlook 2013.