Killer Sudoku, Difficulty 3

Puzzle 4061 Aug 27 August 2011
Puzzle 4070 Aug 29 August 2011
Puzzle 4080 Aug 31 August 2011
Puzzle 4085 Sep 1 September 2011
Puzzle 4095 Sep 3 September 2011
Puzzle 4105 Sep 5 September 2011
Puzzle 4115 Sep 7 September 2011
Puzzle 4125 Sep 9 September 2011
Puzzle 4135 Sep 11 September 2011
Puzzle 4145 Sep 13 September 2011
Daily Killer Sudoku