My08 3.0crd GU, 121,000+ kms. purchased just over a month ago.
Popped the oil filler cap off my engine. there was a fair bit of pressure, enough to bounce the filler cap around inside the moulding.
Once removed there was a constant stream of white mist coming from the fill point.

Holding my hand above the hole (2-3cm) left it wet with oil.

Possibly related:
- oil may have been overfilled at last service. Dipstick shows a reading 50% above high notch.
- also found a bit of oil on the intake side (bug side) of my air filter. It's like an oil smudge that's developed since it's last change. Unsure when this was.
- oil seeping from where the turbo connects to the intercooler.