http://bugs.winehq.org/show_bug.cgi?id=32651
--- Comment #4 from DonJaime@freenet.de 2013-01-05 13:52:54 CST --- (In reply to comment #3)
There is no such a thing as UTF-8 locale for a Windows application.
I was referring to the linux locale.
If a win32 app or one of its components doesn't use unicode internally that makes a difference.
The win32 application and the wine explorer have no problem showing the correct file name. The problem only arises when it is passed back out of wine to the linux application that is meant to open it. That suggests that it arises at the interface between wine and the OS.
Probably you should try to use de_DE.UTF-8 locale for the whole life-time of your brand new ~/.wine prefix.
I don't want my computer to talk German to me. And as I said: I tried and it makes no difference whether the locale is en_US.UTF-8 or de_DE.UTF-8. As you would expect, since date/time/currency formats and so on are not involved.