heres a novel idea - why not just read through what you have written before you submit?
there is really no need for a preview button let alone an edit facility - if people just did this - all the preview button does is open your text box in a new window!
why not skip the previw option and just read the thing in the original box - where you can edit it if need be?
ed got rid of text formatting in favour of the preview option - utterly pointless and useless thing to do
i know some people like the preview box - but instead of being able to do italics, bold etc?
i would say to those who do - just hang back for a second and read the original - then you will see there is no need to open a new window just to look at the same thing
its like me producing a page of writing, then taking a polaroid, and reading the text on there, looking for errors, memorising them, then binning the polaroid, and editing the original.