They were done on DPNs. I have mixed luck with them myself -- last year I made one sweater (picture
here) that was all done in the round, so I had to use double-points on the sleeves (I think that was my first time using DPNs). I couldn't keep it from laddering at the joins between the needles -- my normal trick to stop that is to knit an extra stitch onto each needle so that the gaps are more widely dispersed and therefore not very noticeable, but that sweater required a specific pattern chart to be repeated once per needle, so fudging that way wasn't really an option.
On the mittens, however, I had no problems with laddering -- not sure why, since I didn't even do any of the usual fudging. Maybe the thinner yarn made it easier to maintain tension between needles, or maybe I'm just getting better at it or something -- I'm not sure what the difference was.
