The file scanner uses customized appearance.
While this looks nice, it is really not user friendly.
Controls don't have labels and can be mistaken with ornament.
Controls type is unknown: radio ? checkbox ? thumbnail ? button ?
System controls change also.
Remember that users are familiar with standard controls, won't forget them because they use them regularly, and that they are mostly the same across OS and machines.
Use customs, and you loose that.
Please have a "System" skin !