We're cleaning up questions that were wrongfully migrated to Programmers by the community -cough subjective anecdotes polls find me a job cough- To do this on our end, I first clear an original question's migration history, then close it again as not constructive.
On doing this today, I discovered that answers to the question that were posted on the original site weren't automatically restored when I cleared the migration data.
Here's the question I performed it on: https://stackoverflow.com/questions/8358572/first-programming-language-to-learn (and its revision history)
I'm pretty sure I used the "clear migration history" option to undo the migration before closing the question again. Did something go wrong in the backend?