Greg, there are two LCA issues discussed by Ctein. It seems like you're referring to the Patrick Gainer one where he says we should not focus with blue light. Is this the one you're thinking of?

Here I was referring to the other issue he raises, with VC papers, in which he found depending on how much contrast you dial in (ie how much blue light you let through), the plane of focus can apparently shift by a huge amount compared to using yellow filtration. This would be due to the blue emulsion being significantly sensitive to light around the UV spectrum, and even well corrected lenses are not corrected for longitudinal chromatic abberation outside the visible spectrum.

I wonder if you can solve the entire problem (if there is one) by simply putting a UV filter in the light path.