Show shaded rows in Finder

After a recent update (it might have been to Mountain Lion 10.8.3 last week, I'm not sure), Finder came up and it had alternately shaded rows (shaded, then not shaded, then shaded, then not shaded and so on). It reminded me of the old computer green-bar paper. I liked the look of that as it help distinguish rows when I had Finder in full screen and was showing a long list. The next day I went into Finder and the rows were no longer shaded. All rows were clear/white. I miss what I had and have been unable to find a way to turn that feature back on. Any ideas?