Sticking clutch pedal

[CrisZenithBlue]

this used to annoyingly happen on my Honda S2000, the fix was getting grease inside the transmission on the fork that goes on the throw out bearing. i dont know about this issue on the Boxster but i heard it's highly recommended that you grease that in any new clutch install.

[Gilles]

I don't want to jinx you but it could be a sign of a failing slave (or master) cylinder..