There are many people whose solution fails for few test cases and hence get partially correct answers in the contest.
For Ex: Many people have got 85 points in LIGHTHSE and 60 points in REBXOR in the September Long Contest which means they have all failed to pass the 1st Subtask which might have contained some special/boundary cases.
To help people know their mistakes Codechef can post the Test Cases along with the editorial as people will be able to identify the mistakes in their own code which will be of great help.
Please upvote if you feel this is good idea!
@admin : Let us know your opinion too.