Comment 74 for bug 50254

1 - Be polite
2 - He is a guy
3 - Because it makes harder to read/understand the summary and the people would find the duplicates anyway
4 - It is something that works the way it should work, i.e., this is not an issue. The non-wanted behavior is due to the preference being set false by default on Linux (while it's true on Windows, for instance).