Landing looks like it came in hard on one leg, as it corrected at the last moment to get right on target (since the center engines gimbal is the main control mechanism at that point in flight). You can see this in the SpaceX Flickr feed like this:
So one leg appears to have taken more load than others.
Elon tweeted that the aluminum honeycomb crush core worked to take the load:
Tweet about crush core
Tweet on how Apollo used crush cores in lunar lander
It appears that once you start crushing this way, it does not bounce back, which makes sense.
You can see this, when OCISLY came into Port Canaveral (Jul 2, 2016), carrying the first stage, that the three visible landing legs are at different levels of extension.
Here you can see the leg that is mostly extended, least collapsed.
Here you can see a half collapsed, half extended leg.
This is probably the leg that was mostly collpased, as you can below.
As they came into port, they used high tech materials to prop the leg up: