SWM wrote:
Hm. I don't remember that. I can't find that in Ashes of Victory. Is that in a different book?
It's from IEH when Honor is talking with White Haven and reveals that she is a genie:
"We don't talk about it much, but I'd guess the majority of Sphinxians are genies by now," she replied. He raised a polite eyebrow, and she shrugged. "Think about it," she suggested. "Heavy-grav planets are one of the most common 'hostile' environments. You know that even today most heavy-worlders have shorter than average life expectancies?" She looked at White Haven again, and he nodded. "That's because even with modern medicine you can't put a body designed for a single gravity onto a one-point-three or one-point-five-gravity planet and expect it to function properly. I, on the other hand—"
And:
"That's fascinating," White Haven murmured. "You say more than half of Sphinx has the same modification?"
"That's only an estimate, and it's not one modification. The Harringtons are descended from the Meyerdahl First Wave, which was one of the first—in fact, I think it was the first—heavy-grav modification, and folks like us probably make up about twenty or twenty-five percent of the population. But there are several variations on the same theme, and worlds tend to attract colonists who can live there comfortably. When you add the free passages the government offered to recruit fresh colonists after the Plague of Twenty-Two AL, Sphinx wound up attracting an even bigger chunk of us than most, including a lot from the core worlds who wouldn't even have considered emigration otherwise. In many respects, the Meyerdahl genies are the most successful, in my modest opinion, though. Our musculature enhancement is certainly the most efficient, at any rate. But we do have one problem most of the others don't."
"Which is?"
"Most of us don't regenerate," she told him, touching the left side of her face. "Over eighty percent of us have a built-in genetic conflict with the regen therapies, and not even Beowulf has been able to figure out how to get around it yet. I'm pretty sure they will eventually, but for now—"
My interpretation of these passages is that while the conflict is not associated directly with the locked part of the mods that there is something within the mods (maybe some not-locked-in part?) that is interfering with the regen therapies.