After answering a question the other day I came across an unusual situation.
The content of the answers received prompted the original poster to change edit their question (both title and content) such that it significantly changed its nature and substance.
Without going into specifics, the question talked about performing an action on a particular class. The edits changed both the required action and the Class to act on -- from "How do I cut down a tree?" to "How do I grow a flower?".
As a result, the existing answers - which answered the original question - are no longer relevant to the newly worded question.
So, what is the etiquette for changing a question? Obviously clarifications and embellishments are encouraged to get the most accurate / specific answer to your question, but at what point should we just ask a new question? Is there a point at which question edits should be rolled back?
Further, what's the etiquette for the now inappropriate answers? I personally deleted mine as it was no longer appropriate - should I have instead edited it to add a quote citing the original question?