I'm trying to enter a comment on SO, and when I hit Add Comment it just prints "4 more to go.." in grey underneath the comment box. Does this mean I don't have enough reputation to enter a comment? I did yesterday. Plus, it's my own question!
You must enter at least 15 characters, otherwise it won't let you comment.
When you first click on 'add comment' the text below the comment box displays:
means that you must enter 4 more characters.
As others have said, there is a minimum 15 character length for comments.
Also, you don't yet have enough reputation on SO to comment on all posts. However, quoting from the FAQ, "you can always comment on your questions and answers, and any answers to questions you've asked, even with 1 rep."