http://bugs.winehq.org/show_bug.cgi?id=26749
--- Comment #6 from Dan Kegel dank@kegel.com 2011-10-28 13:42:06 CDT --- Workaround: quote the path, e.g.
call "c:\dummy dir\foo.bat"
Either way, foo.bat gets run, but with the unquoted spaces in the path leading to it, the environment isn't shared with the parent cmd?