Could someone give me a pointer about the etiquette concerning comments that become "stale"?
If I add a comment pointing out a simple error in an answer, and that answer is subsequently edited to remove the error, it makes the comment look a bit spurious. So my question is this: should I then delete my comment, or is it considered better to just leave it there, even though it is no longer really relevant?
In the interest of keeping an accurate record of the conversation that took place, leave the comments alone. People can see that a post has been edited and check the edit history, but most can't see deleted comments.
Also, many people may be annoyed and/or confused if you delete their comments without asking first.