Paper cut bug
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Canonical defines a paper cut as : "a trivially fixable usability bug that the average user would encounter on his/her first day of using a brand new installation of the latest version of Ubuntu Desktop Edition."
The first such campaign was in June 2009, and each such release has been accompanied by a paper cut project.
The sort of work effort involved should be that it would involve no more than a day's work for a competent programmer.