[ Software ] Open Question : What is the version of the most stable Linux Kernel Release?

What is the version of the most stable Linux Kernel Release? What are some of the key additions and/or changes in this Kernel version? Guys please I need to turn this in tomorrow and I am completely lost, any help would be greatly appreciated. Thanks a lot in advance

Source: http://answers.yahoo.com/question/index?qid=20110518195904AAmgV6D

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