Here is my finished Butterfly! As you can see, it turned out longer than in the Rowan picture - it's a little past my knees. But that might be because when I blocked it, I stretched it length-wise not width-wise as I made a size too big for me...
This knit-along has been very inspiring, and motivated me to knit on! I can't wait to see everybody's progress.
By the way, I got a reply from Rowan:
Thank you for your query regarding 'Butterfly' from 'Magazine 37'. Please accept my apologies for the delay in replying to you.
I have checked the graph for the vest in the magazine and there are 71 sts at the pick up lower edge. I feel that the extra st you have casted on is the reason why your pattern is going astray at the double decrease as there are no errors in the chart. When working in lace patterns we would always suggest that you do not work the yo's at the beg of your row and instead just work in st-st
therefore for your size the first few rows should be worked (not including the beads that are randomly placed:
Row 1 - * K2tog, yo, k1, yo, k2togtbl, k1, rep from * to last 5 sts, k2tog, yo, k1, yo, k2tog tbl. (71 sts - 5 = 66 sts (patt rep of 6 sts worked 11 times)
Row 3 - K1, * k3, yo, dec 2, yo, rep from * to last 4 sts, k3, k1. 71 sts - 5 sts = 66 sts (patt rep of 6 sts worked 11 times).
For your size the width at the bottom will be 42cm, waist will be 33cm and 37cm below your armhole.
I hope this information is of use to you and wish you well with your knitting, however, if you have any further queries please do not hesitate to contact us.