The One Hundred Paper Cuts project says it will fix 100 'paper cuts' in each release cycle. What is the definition of a paper cut?
From the papercut website:
As for the definition of a paper cut:
All the information on how to get involved is on the site too. See https://wiki.ubuntu.com/OneHundredPaperCuts for more information.
The definition of a paper cut
Put briefly, a paper cut is a trivially fixable usability bug that the average user would encounter in a default application included on the Ubuntu desktop. If you prefer a more detailed, itemized definition, a paper cut is:
If a potential paper cut fails to meet '''any''' of the criteria above, it is '''not''' a paper cut.
How can I tell if a bug is easy to fix?
A bug is easy to fix if it can be fixed by one person in one day. In practice, one or more people might work together over the course of a week to fix a paper cut, but if one competent developer cannot fix the bug in a single day, the bug cannot be considered a valid paper cut.
Many complex bugs become trivially fixable right before they are fixed. If a bug appears too complex to be considered a paper cut at first, it may turn out to be trivially fixable if it has a working patch that could be cleaned up and merged by one person in one day.
It often takes a good deal of technical experience to know whether or not a bug is trivially fixable. If in doubt, send a message to the Paper Cut Ninja mailing list, or ask in #ubuntu-desktop IRC channel on Freenode, where someone will be able to point you in the right direction.
Who is the average user?
If you are reading this answer, or reporting a paper cut on Launchpad, chances are that you are not the average user. To understand who the average user is, check out the following articles:
What is not a paper cut?
While a paper cut does have a definition, it's not too strict. If an issue lies on the border of being a paper cut and not being one, then report it anyway and the Paper Cut Ninjas will take it from there. If it satisfies one of the criteria for not being a paper cut yet you think it should be considered, then report it anyway and the Paper Cut Ninjas will decide what to do with it.
The paper cut team has a very open mind. If something looks and sounds like a paper cut, it probably is.