This is a minor update, they should have called it 2.1.6
A 2.2x sounded more like a major update. But what do I know about update naming.
Originally Posted by murg
Kobo has released 2.2.0 (Touch) and 2.2.1 (Glo) for Japan. Not sure which version the Mini gets.
1. Benefit from improved title displays
2. Sync your library to a microSD card if your device is full