https://bugs.winehq.org/show_bug.cgi?id=40016
--- Comment #2 from Rencer rencer@euromail.hu --- Thanks!
Putting the Courier New font (I extracted that from my WindowsXp CD) to my ~/.fonts folder solved the problem.
P.S.:
Does not the Courier New font is some kind of a standard font in Windows? I think it is a good idea if this font was installed default with Wine, so no more problems like this. Anyway, thanks again for the help.