As I explain in [1], many Windows programs get command line argument
quoting wrong.  Emacs is one of these programs.  The attached patch
resolves the issue, and if there are no objections, I'll apply it to
both the Emacs 23 branch and the trunk in the next few days.

[1]
http://blogs.msdn.com/b/twistylittlepassagesallalike/archive/2011/04/23/everyone-quotes-arguments-the-wrong-way.aspx