On my 102 the series of events happened as described by Peter above. First I got the rear leak, very slight. It never really turned into a leak per say. No puddles or spots on the drive way ever! It just slowly over the period of a year soaked the rear of the head all the way down to the oil pan.
Eventually, months later, I started to notice 'caramel' and 'chocolate' oil globs appearing in the coolant. Car is now in the shop getting engine rebuilt. I decided to fix everything while I was in there.
Not disagreeing with any of you. Just explaining my experience and hope it helps someone.