Oh the humanity! One of my favourite features, which I use constantly in Ubuntu 10, is the ability to rollup windows by rolling my mouse wheel on the title bar.
Unfortunately in Ubuntu 11 this feature is omitted by default. Rar what am I to do!
Anyway to fix this in a terminal run the following:
gconftool-2 -s -t string /apps/gwd/mouse_wheel_action shade
This will enable rolling up the window again automatically – no need for a reboot!