It seems like spaces are not allowed in directory names.
Code:
Search string: Krause
grep: /mnt/cf/pdf/Foundations: No such file or directory
grep: of: No such file or directory
grep: GTK+: No such file or directory
grep: Development/manifest.xml: No such file or directory
[...]
./run.sh: 87: [[: not found
After changing dir's name from "Foundations of GTK+ Development" to "Foundations_of_GTK+_Development" it is working.
[EDIT] I had got a space bug in my jukebox mpd scripts, too.