I went back and checked the pattern, and found the pocket yoke does not fit the front properly (naughty Burda!) and this is what is causing the pocket to gape. Luckily I have enough fabric to recut the yokes so I can enlarge the waist, and maybe even add a hem band to lengthen the skirt.
So I today have unpicked all that topstitching....., and no prizes for guessing what I'm doing in the weekend!
In the meantime - hope you have a lovely one!
Muriwai Beach, Auckland, New Zealand, May 2008