The odds had to catch up with me eventually, and they did today. I've never had to return a lens, all the ones I've bought through the years have all been great right out of the box. But alas, my new 35 f2 is quite soft in the top right corner. I tried it numerous times on different surfaces and subjects, on a tripod, squared up with the wall, and each time the results were the same. If was better by f5.6, and just barely noticeable at f8, but it was too bad to overlook.
I can tell though that this thing would do a fine job. Slight CA at 2.0, particularly on the chrome trim on the car I was shooting, but it was minor and would clean up easily in PP - much less than my 50 1.4. It's sharp, with good contrast and color in various lighting situations. Focus is noisy, but quick and sure. Build is adequate for anything I would do with it.
Bummer it has to go back, but win some, lose some.
60D / EOS Elan / 15-85 IS USM / 70-200 f4L IS / 50 1.4 / 430ex / Fujifilm X100s / Slik U-212 (a genuine antique, like me....)