[ubuntu] How to update Unity and speed up launcher scrolling

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http://ubuntuforums.org – Hi. I've checked over internet and i haven't found solution yet. My question is: how to update Unity? In synaptic i have version 5.xxx but i know that version 6.xxx for 12.04 contains few fixes, i especially want this one: https://bugs.launchpad.net/ubuntu/+s...ty/+bug/906072 In unity 2D scrolling launcher with apps is much way faster, while on unity 3D is so slow that in fact it is not useable - i had to install cairo-dock in order to have full functioning desktop with Unity interface. Could you tell me how to either speed up launcher scrolling and update Unity? Thanks. (Hardware)