An update has been released for Outlook 2013 and can be downloaded and installed manually, but is also being offered via Microsoft Update.
There is a known issue with this update where Outlook crashes when you try to select or open an encrypted message (Application Version: 15.0.4517.1003 Exception code: 0xc0000005 Offset: 003ac9b5 is logged in the Event Viewer).
Microsoft has confirmed this issue but the update will not get pulled.
For now, if you are affected by it, it is recommended to uninstall the update. As it isn’t a security update, not having it installed won’t leave you vulnerable to anything.
This issue is fixed in the August 2013 update for Outlook 2013.
Update KB2817468 for Outlook 2013
This is a non-security update which solves 5 issues and also includes the 3 fixes of the June hotfix.
Most notable fixes are:
- When you use a Microsoft Exchange ActiveSync (EAS) account in Outlook 2013, the  suffix is appended to the calendar names in the Calendar module.
- When you select “Calendar Details Style” before you print or print preview a calendar in Outlook 2013, all calendar items are listed two times.
- When you change the dots per inch (DPI) setting in Windows to a high value such as 125 DPI or 150 DPI, some icons in Outlook 2013 are displayed incorrectly.
If you have Microsoft Update configured to also update other Microsoft applications, then this update will also also be offered via Microsoft Update or has already been updated automatically for you.