Hi,
Contact specific history in metacontacts isn't really working for me, at least not for outgoing messages.
Before the update the history was saved separately for every contact in a metacontact plus the metacontact itself.
Now it seems outgoing messages are just saved for the metacontact, meaning that if you delete and split it to separate contacts again the outgoing history is just gone.
Incoming messages on the other hand seem to work as before, I can see them in the history of the metacontact and also in the history of the included contacts.