Warning for users to stay with the default open source driver for AMD/ATI Catalyst/Radeon chipset for now. Do not use fglrx proprietary driver. Discovered this installing on an AMD based Acer Aspire Notebook. When installing proprietary driver it will hang on boot, and recovery will be almost impossible for the average user. You can read more about it here:
Other than that, really liking ubuntuMATE 15.10, congrats and thanks for a great new release!