From Asus' Swedish facebook site:

V19.
New Features:
+ Press-able notification in Lock screen
+ User can able to check reminder or notification of unread email under screen locked.
+ Upgrade Vibe from v1.0 to v2.0 with corresponding MyLibrary and MyCloud versions - Vibe2.0 improves UI and provides more media contents

New Functions:
+ Support the USB to LAN cable of UX series (Accessory)
+ Camera FW background forced update mechanism - Camera FW upgrade will be automatically installed with image upgrade so there is no need to press the independent camera upgrade icon in the notification area.
+ Support Ad hoc mode (Ad hoc mode was supported in HC but 1st time support in ICS)
+ Keep use’s choice of browser viewing type (Tablet or Desktop website viewing type)
+ Enable power profile (Battery information setting)
+ New display mode of HDMI output - Scale mode(Default) and Crop mode (Detail comparison in next two sides.)