unless VR has the wrong shape or size, I am going to defend VR and going to say most leaking gaskets are due to improper user install.
I once had a leaking VCG (OE/Genuine BMW) and I found out that it was leaking because I didn't install the gasket dry. I decided to "lube" the gasket.
My friend also had a leaking VCG (OE/Genuine BMW) and it was leaking because the gasket fell off its groves on the cover toward the back.
VR is an OES for gasket and gasket makers for major european automaker (BMW, VW, etc)