http://bugs.winehq.org/show_bug.cgi?id=21131
--- Comment #7 from Austin English austinenglish@gmail.com 2010-02-18 09:57:29 --- (In reply to comment #6)
That's incorrect; Unix is stripping your quotes. The correct test case from the commandline would be something like $ wine cmd /c echo '"&"' but the output for that is bizarre: "&" perhaps we do have a bug.
Using backslashes does the same: austin@midna:~$ wine cmd /c echo "&" "&"