I just started round 40 this morning and discovered a mistake. It was corrected on the pattern on January 28, but if you printed off the pattern in December like I did, you might have missed the update.
If you've already done round 40 and came up with 300 trebles, I'm so sorry! That's a lot of frogging. The round should have 270 trebles (30 groups of 9); you have to reprint page 7 of the pattern to get the correct stitch combination.
I'll be back later today with pictures.