Is there an option to receive a notification, when a post you downvoted was edited?
With a downvote you suggest that something is wrong, after the poster edited it, maybe there is no reason anymore for the downvote.

-
You can favor it... –  draks ... Mar 3 '13 at 16:17
If you haven't seen one, then there probably isn't. This would make a good feature-request. –  robjohn Mar 3 '13 at 17:10
this would need to be optional... –  user58512 Mar 3 '13 at 18:30
SE should introduce a Watch list in addition to Favorites list. A single favorite star can't do both things: mark the questions to which user hopes to return (to write or improve an answer), and mark the questions that are simply monitored in case something happens to them. // The Watch list should be visible to the user only, unlike the Favorites which are public. Otherwise, adding downvoted questions to the list would compromise the anonymity of votes. // Of course, such requests were made already and of course to no avail. –  user53153 Mar 3 '13 at 20:46
So here is a workaround. In order to watch a post for future changes, you can leave a comment containing invisible LaTeX ${}$ (of course, the comment should be a real comment, e.g., a remark about what's wrong). Later (some weeks later), run this query which displays the posts to which you commented with this string, and which were edited after your comment. The results are ordered by the last edit date. (Note: it is best to log in to Data Explorer to run the query, so that UserID field gets pre-filled with your user id.) –  user53153 Mar 4 '13 at 2:52
@5pm: Now that’s potentially useful even to those of us who never downvote but do leave comments in hopes of getting mistakes corrected. I don’t know how often it happens, but if the poster corrects the answer without responding to the comment, I don’t normally see it. –  Brian M. Scott Mar 4 '13 at 21:25
It's easy to forget to insert the ${}$ code, but one can include it in the auto-comments inserted by the customizable auto-comment script. –  user53153 Mar 6 '13 at 21:30
This would also be useful in other stackexchange sections, in particular those not allowing LaTeX... –  GEdgar Mar 10 '13 at 15:37
If you support this, you should upvote the respective Allow me to get notifications on specific down-voted questions @cardinal linked to - this is something not specific to math.SE but the whole SE network –  Tobias Kienzler Mar 14 '13 at 9:19