Can't Create New Folder

I was trying to create a new folder in my Movies folder, and I got this error message: The operation could not be completed. An unexpected error occurred (error code -8058)

The strange thing is that I can create a new folder in other places.

Can anyone help me out with this?

Have you ran Disk Utility ->First Aid->Verify/Repair Disk
Also, Disk Utility ->First Aid->Repair Permissions

As he said, repairing permissions should work. You can also try repair disk, but you need to boot off the OSX cd for that to work right...