[ubuntu] Upgrading to Xenial BROKE Ambiance!

Hello.
Not sure if this should go here, but this happened when I upgraded.
I've been using Ubuntu for a while now.
I had made a clean installation of 15.04 a while now which I upgraded to 15.10. It was a while since I last booted into Linux, so today I decided to upgrade to Xenial.

All I gotta say is I'm not very happy, cause the upgrade somehow BROKE the Ambiance theme, including windows and icons.

The icons have the default look, the title bars look white, making text unreadable, and the upper bar thing from Unity is completely transparent.

broken!.jpg

Any help would be appreciated. Thank you!