Hi,
I loaded the lh.orig cortex for fsaverage into Matlab. My colleague and I found that it actually has a duplicate point.
The index of the duplicate points are:
1 40970
I checked that both have the same vertices coordinates:
-36.7233 -18.4039 64.3611
I'm not sure if this is intentional or not but wanted to draw the freesurfer community's attention to this in case it is a bug. Also, I believe a similar issue is present for fsaverage's lh.pial and rh.orig (I haven't checked other cortices).
Regards,
AZ