Bugs found in ubuntu mate beta:

Firfox can freeze system if downloading compressed file and opening containing folder from downloads button menu in firefox
	-can only right click the shutdown button in top right menu bar
	-sometimes can not select an option in the shutdown menu

	-accessing from the all-downloads window also frozen firefox

Independant of firefox, sometimes you can only right click the shutdown button on the menu bar

In the Arduino IDE, while opening serial communiction window, the script window will resize to default size and position. (only tested with compiz).

Side-by-side window tiling is imperfect w/ ~5px gap in center