http://bugs.winehq.org/show_bug.cgi?id=32833
--- Comment #7 from Sergio Callegari scallegari@arces.unibo.it 2013-05-30 02:46:52 CDT --- Just a reminder. Bug still present in 1.5.31. Hurts, since it may break the help system of applications (E.g. LTSPICE, which conversely advertises wine on its web page and tries to be wine friendly).
Furthermore, I suspect that it can be exploited to forge paths with spaces in order to have users run some code when they expect to run some other.