I found kind of a work around. After typing something in I always highlight everything I typed in, right click on it and hit copy. After hitting the post button once...if nothing happens, just go to the top and hit the Home button.
Check to see if your post came up. If it did not you can always try it again where you have everything copied to your clipboard. You can just go back to reply and right click in that box again and hit paste..
That has worked for me several times without double posting. And I have not had to re-post by pasting. Just going to the home key has worked.. Hope this helps....I am sure SittingDuc is working on it...Just be patient...