http://bugs.winehq.org/show_bug.cgi?id=3560
------- Additional Comments From jonathan@ernstfamily.ch 2005-15-10 07:39 ------- Hi Spiro,
I reopened the bug and changed it's summary because I think there is indeed a bug in Wine and that your setup should work (letting LC_ALL empty).
In the meanwhile you can run wine using
LC_ALL=whatever wine winecfg
for example.