Ok guys... I've got a problem that, frankly, I don't know what to do to fix. Whenever I go from a knit stitch to a purl stitch, that knit stitch always seems to be loose and misshapen and there tends to be a gap between the two. Now, the gap isn't a huge issue for me because the "rib" (so to speak) generally hides that. But the loose knit stitches are the bane of my knitting at the moment. I've tried tightening them 10 ways from Sunday and I still can't get them even. I don't know if it's something weird like the angle I purl at, but it's always when I go from knits to purls. Here's a picture. Any ideas?