There is a typo in the version of the pattern published in the Stitch n Bitch calendar (January 11, 2008)

in the decrease rounds, the pattern reads “s2s” but SHOULD read “sl 2, k1, psso” meaning “slip 2 stitches knitwise at the same time, knit the next stitch, then pass the two slipped stitches over the knitted stitch and off the needles. ”