@Aquila Kytori : I asked myself the same question as you, but I think it has nothing to do. On the one hand because the wrinkles do not appear exactly the same place, they extend further and secondly because we found other places like on the shoulders and near the knees.
@Gaia Clary : my version of Avastar is the 1.3-18, i use this on Blender v.2.76.
I confess to not having hitherto imagined that the problem could come from there but now that you mention it ... I think that basically, this version of Avastar is dedicated to Blender 2.70 ? For the name of the entire file is this: Avastar-1.3-18_blender-2-70
For the shape, yes, it is exactly the same in Blender and SL ! Ok, I'll send you a copy of my body Mesh ! ;-)
EDIT : Well, Gaia, I sent you my shape on the Beta grid ! Thanks again ! ;-)