Yes, there is lots of useful information here, and thanks for directing me to it. The claimed improvements to fixing chromatic aberrations in digital cameras, including ability to fix LoCA fringing, are impressive
However, the article seems to apply only to ACR 7 (which I presume is exclusive to CS6) and LR 4. My question was really about ACR 18.104.22.1689 in CS5, which installed via Adobe Updates, during the past week. On my system, this update appears to have removed the manual fringe removal tools in the Lens Correction palette.
There is nothing about this in the release notes, so has something gone wrong here?
However I have discovered that my lens is now supported, and that applying the (semi) automatic adjustments via the Lens Profile tab does a reasonable job of fixing chromatic aberrations (as well as geometrical aberrations) and is a lot quicker to use. However the manual tool should still be there to fix problems with unsupported lenses as well as a means of applying finer adjustments, perhaps to selected parts of an image, or to accomodate variations in manufactured lens quality.