There was one with a clutch problem reported in the USA but does not seem to be the same behaviour as you report.
[link=http://www.planet-9.com/981-cayman-gt4-chat/115678-my-gt4-getting-new-clutch-already.html?highlight=gt4+clutch]http://www.planet-9.com/981-cayman-gt4-chat/115678-my-gt4-getting-new-clutch-already.html?highlight=gt4+clutch[/link]
No other issues reported as far as I can see so back to the dealer.
[link=http://www.planet-9.com/981-cayman-gt4-chat/115678-my-gt4-getting-new-clutch-already.html?highlight=gt4+clutch]http://www.planet-9.com/981-cayman-gt4-chat/115678-my-gt4-getting-new-clutch-already.html?highlight=gt4+clutch[/link]
No other issues reported as far as I can see so back to the dealer.