Oil leak from between head and block

Thanks guys.
cracked: I had a look at the rear intake seal, right after your post, but it´s all dry around that area.
When I pull the head I´ll first inspect the intake seal, to see if it hasn´t sealed properly. Is there any obvious signs to look for on the intake seal, besides the oil of course?
Thanks again for your inputs, very much appreciated.
Lenny
Btw, should the iron 915 heads be retorqued after a warmup, when recently installed?