As many of you noticed, Puzzle 445: CASP9 Refinement Puzzle 8 - Double Start with constraints
had to be closed and reposted due to errors in the starting models.
These errors weren't immediately apparent, but were noticed and reported by many players: http://fold.it/portal/node/990139
By the time we finally noticed the problem, fixed it and closed this puzzle, one day had gone by.
Because the puzzle was supposed to be up for ~7 days and it was worth 100 points, the closed puzzle was awarded a maximum of 15 points (since 100/7 =~ 15) for the 93 players that played it.
This was discussed at our weekly Foldit meeting today and this policy will be used for any future cases where we have to close a puzzle early.
Ideally, we will catch any problems early (we usually try to monitor chat & the puzzle comments and feedback right after a new puzzle is posted) but sometimes it takes a while to find out that a new puzzle is useless.
We welcome any feedback on this and will gladly take it into account for future puzzles, but we will not change the points given on any previous puzzles.