Occassionally, a user will post a comment:
possible duplicate of stackoverflow.com/questions/....
However, they themselves won't vote to close. For example, this question from earlier today.
I take a look at the possible duplicate, then I go back and take a look at the original. Lo and behold, they are similar enough that I would consider them duplicates. Now, if I go to close, much of the time, stackoverflow doesn't suggest that the linked question in the comments is a duplicate, so I have to close the "close question" dialog, go to the other question, copy the url, go back to the original question and go through the vote to close procedure again. This seems like an unnecessary hassle when the url is already there in the comments. Would it be possible to scan the comments for urls and somehow determine which of those are possible duplicates?