An issue was identified and fixed involving Quick Reply.
If you posted a Quick Reply, but there was a delay in displaying the post(s), the post you just posted (and all other posts made by other users since the last time AJAX Threads refreshed) would duplicate.
By now you all should be well familiar about how I release my hotfixes
Nothing changed in the product XML though.
Seems when you post using quick reply, it will ask if you want to stay on the page or not in a popup box. It only posts if you navigate away. This seemed to occur when I'd let my computer slip into sleep mode, and relogged back into windows, and then made the post.