Ok, so the new Chromatic Aberration tool in Lightroom 4 is totally hands off. Just check the check box and it figures it out. Sigh. My immediate reaction is, FAIL.
I just imported some high key shots and it's not getting it done. Before I went off on a righteous tirade i brought the file in question into Photoshop CS5 and brought up the lens correction tool there to see what it could do and... well, i couldn't fix it there either. For this particular image i think that i'm going to have to do something custom if i really want to fix the CA issues.
Still not loving the idea of loosing controls but of late I have rarely encountered much CA. I guess i'll just check the damned check box for now.