Besides stuff, that is more of a technical nature, here are some new features of the official viewer 1.12.6 that everyone may get in contact with:
Excerpt from the Wiki:
– Support for Friendship offers to include 1 line of freeform text to allow requester to clarify their request
– Allow inventory to be dropped onto IM windows
– Pop open the Inventory window when you receive new inventory items.
* NOTE: You can turn this off in Preferences > Popups tab
– Add the preference “Turn off typing animation when chatting” to Edit > Preferences > Text Chat
– Add Time Stamp to Parcel Object List