That is something that has been brought up many times before, and thus far rejected due to the problems it would lead to. For the reasoning behind this, see Lee's official response as well as my own concerns. Even if it were approved, such functionality has not yet been implemented by the engineers, meaning they would have to go through the process of coding and testing it before it would be introduced. Thus, I don't see if making an appearance in the immediate future. Instead, try to preview your post whenever possible and post all updates as replies.
John
Is there any way that you could actually make it so we can edit our own posts?

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