Note January 2011: Several knitters have found that the suggested yardage, 450 yards, was insufficient, so it’s been updated to 450-500 yards. Depending on your gauge and size, you may need a third skein.

Not exactly Errata, but helpful to know:
Instructions that read, “knit, (purl, purl, purl)” are meant to indicate what to do in each size, not to work these stitches in succession. If you have size small, knit. If you have size medium, purl.

Errata as of May 25th:
Stretchy Hexagon Round 2 after the closed square bracket it reads: “4 times - 12 stitches decreased.” Since the Hexagons are worked on 3 needles with the fourth needle knitting, it must read “3 times - 12 stitches decreased.” You have to repeat three times, not four times.

Errata found on May 28th:
On page 108, in the Cuff instructions, the total number of stitches after picking up for the cuffs should read 64 (72, 80, 88).