QUOTE(sune @ May 30 2007, 11:49)

this is kind of obvious, but have you tried clicking the "+" sign next to the parent directory? all the sub-directories should display...
I'm awfully sorry that this hint does not solve the problem. I can give you a screencap that illustrates the issue if you want.
Btw: Using "Add Files" goes with no further obstacles. All the directories are there. It's only the "Add Directory" command that causes trouble.
It's kind of disturbing if you try to add several albums in line to your playlist.
Just thought that the developpers might be interested that such errors can occur...
(my version of foobar2000 is: v0.9.4.2. I have not changed any files after installation.)