For example: I have these files (in the correct order): Dirty Harry.avi Dirty Harry 2 - Magnum Force.avi Dirty Harry 3 - The Enforcer.avi Dirty Harry 4 - Sudden Impact.avi Dirty Harry 5 - The Dead Pool.avi Thunar orders them: Dirty Harry 2 - Magnum Force.avi Dirty Harry 3 - The Enforcer.avi Dirty Harry 4 - Sudden Impact.avi Dirty Harry 5 - The Dead Pool.avi Dirty Harry.avi
Well, that's correct because '.' > ' '.
Resolving to INVALID then.