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You're using OS X 10.6.8 - the version without system-wide support for V1 RAW. That MAY explain why V1 RAW icons are not displayed.
No, as I just posted before your post, this Apple statement clearly shows the J1 & V1 RAW being supported by version 10.6.
Mac OS X v10.6: Supported digital camera RAW formats
Learn which digital camera RAW files are supported by Mac OS X v10.6 Snow Leopard, or later. Many digital cameras offer options to save pictures in digital camera RAW format.
Mac OS X 10.6, Aperture, iPhoto
Digital camera RAW formats retain more image information than JPEGs and can produce better results when used with imaging applications such as Aperture and iPhoto. Mac OS X v10.6 Snow Leopard provides system-level support for digital camera RAW formats from the following cameras:
Supported by Digital Camera RAW Compatibility Update 3.9
Canon PowerShot S100
Nikon 1 J1
Nikon 1 V1