Heap more work into this for you guys:

Should be much improved on your mobile ... especially for Samsung Galaxy S3, when entering a post. Android has issues there, but found a way to restrict the zoom so it doesn't jump around/zoom in so much.
Also improved for iPhone .. the 'double screen' issue (when in landscape) all fixed .. display is now elastic and fills out when in landscape.
Editing a post now works as it did before, and should return you directly to your post.
Added a 'cancel' button for if you change your mind about posting. (who ever does that?

)
And a heap of other little tweaks - thanks to you all for the comprehensive feedback.