Is a UV filter recommended for a 24-105?

maiabing actually researched this last year, and the findings were interesting (ref. http://forums.dpreview.com/forums/thread/2986237). Among the non-white weather resistant L lenses:

EF 14mm f/2.8L II USM

EF 16-35mm f/2.8L USM  +needs front filter

EF 16-35mm f/2.8L II USM  +needs front filter

EF 17-40mm f/4L USM  +needs front filter

EF 24-70mm f/2.8L USM

EF 24-105mm f/4L IS USM

EF 100mm f/2.8L IS USM Macro

EF 50mm 1.2L USM  +needs front filter

EF 85mm 1.2L II USM

EF 24mm 1.4L II USM



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Regards. Anders