What are you using? StretchLegs or scaling? If scaling, did you update V3?

When I use stretchlegs to 1 I get a bump behind the knee when bending. The other flatness on top of vicki's leg is a result of bending the wrong part.. usually you have to use a combination of bend to the glute and to the thigh to get a non-flat result.

Incidentally, Vicki is already 8+ heads tall. You could get a long leg effect by shortening the trunk.