I've been a user for a few months now (mostly an answerer), and every once in awhile I get a notification that says a user has commented on an "old" answer (where old is > 2 months old). It's usually a follow-up question about the code, or perhaps the asker has added some things and now it isn't working like the simple example I provided.
(For a recent example, check this post out)
I'd like to help the asker out (after all, that's what I come to the site for), but I feel like the discussion does not belong in the comments of the answer.
So my question is, am I on the the hook for all of my answers? If so, for how long? It seems like the best thing for an asker that's having problems with an answer that's been accepted to do is post a new question. Is this the right attitude?