My ribbing (just for an example, we'll say it's a 3x3 rib) is not happening at an even tension. I don't have tension problems with anything else, but for some reason the ribbing is really killing me. Looking at a ribbed portion I've knitted, the knit stitches go from \ / to \ / to \/. So the left-most stitch is loose and the rightmost stitch is tight. I've tried consciously adjusting my tension when I switch from K to P and vice versa, but perhaps I have it backwards in my head. Any help?