List of steps to reproduce (step by step, including full links if applicable):

• Go to m:SE?veaction=editsource with VE enabled.
• Replace all content with #REDIRECT [[{{Current SE}}]]
• Preview the page

What happens?:
VE lets you know that the page will be a redirect. In fact, it was not. The same thing cannot be reproduced with the 2010 wikitext editor nor action=parse.

What should have happened instead?:
It should have been parsed correctly.