Completely revamped contact synchronization
A badge in the Contacts tab indicates that new contacts have been added
Threema calls: A short vibration indicates that the other party has activated the camera (if in-app vibration is turned on)
When sharing individual media messages with other apps, captions can be maintained (and edited)
When editing images, the message recipient is displayed in the text input field
Catalan localization
Various other improvements and several bug fixes
