Batch-add problems in paths with UTF-8 naming

[fribse]

I have a structure with my pictures in folders with danish filenames.
Ie. One is called 2009 Hvalpetræf
When I browse to the folder in batch adding, it will not show the folders content, and the OK button isn't shown.
If I rename it to 2009 Hvalpetrf it works as it should, but it's of course not the right title.

http://www.fribert.dk/cpg

[Αndré]

Only alphanumerical characters are allowed in folder names.

[fribse]

So, that's a degradation in capabilities, that's very bad, now I have to make exceptions when I add the pictures to coppermine, compared to the normal filestructure.
Previous version didn't have a problem with the three danish characters æ, ø and å.