I noticed in recent weeks that my Avatar Habitat boost icon was not visible for a short while, and that the positioning of buff bar icons was odd. And today when I logged in, I noticed I had an icon for a boost to Constitution, even though my hit points weren't boosted.
I logged in to the test world.
The Constitution boost icon was visible. I couldn't test the Avatar Habitat, since clan citadels are different worlds. So I slew some goblins, and made a bonfire with their bones.
Everything worked normally; but while the Constitution icon blinked off when the warmth of the bonfire wore off, it then reappeared. So it may be that while the fix avoids creating corruption to a user's data, it can't cope if the corruption was created before the fix.