I have the symbol "general_profil" change in format 32x32 and 48x48 and copied to the N900. The status bar, it is immediately visible, but when I go into the settings and they are still just loaded, I look for a little while, the original image, and only then it is changed with the new.

usr/share/icons/hicolor/32x32/hildon
usr/share/icons/hicolor/48x48/hildon

Why is this so and how can I change this?