What version of DPP are you running? Have you updated lately? If not, maybe you should.


I ask because your problem sounds a lot like something Bryan mentioned in his EF 24mm f/1.4L II review, where he stated, "What I discovered was not a lens issue with the first copy, but a bug in Canon's Digital Photo Pro software. DPP was adding "Luminance Noise Reduction = 2" to all of my 1Ds III (and other Canon DSLR) images shot with noise reduction turned off. Even those I shot long ago. Apparently this bug was introduced in a recent update as DPP has never done this in the past."