I tried to install this cursor theme on the latest version of ubuntu:
http://gnome-look.org/content/show.php/Microzoa?content=154458
It downloaded as a 7z file, so I extracted it, and copied all the extracted files to usr/share/icons folder. Then I installed gnome-tweak-tool and I went to advanced settings > theme > icon theme (and selected Microzoa). But then nothing happened. I restarted computer and still the new cursor them doesn't appear at all.