In a day of snakes and ladders, Gemma Jones and Jason Saunders briefly led the Nacra 17 world championships in France overnight (NZ time) before suffering a capsize and ending the day in sixth overall.
The damage wasn't too significant, with many of the top teams struggling on the fourth day of racing in the light but choppy conditions, and Jones and Saunders are only 11 points behind leaders Ruggero Tita and Caterina Banti of Italy.
The championship is wide open with six races before Monday morning's double points medal race remaining, with just 11 points between the first seven crews.
Olivia Mackay and Micah Wilkinson continued their steady progress up the leaderboard, moving up two more places to 14th overall, but they were disqualified from the first race of the day when they were over the start line prematurely. They were 10th and fifth in the other two races.
Jones and Saunders jumped to the top of the leaderboard after two races overnight on the back of a second and eighth but disaster struck in the final race.