The mouse should not disappear off the screen, ever. Makes it very hard to orient by zipping it to one corner, because it disappears. This is literally covered in usability 101 - buttons on the sides of a screen can get infinite size for free. (Note: current problems here may be the result of the dual monitor setup. #firstworldproblems)
Unity's start menu thing opens to cartoonishly big icons and font, but the default size for the rather important x (close) and expand buttons on the menu bar are miniscule.
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