A friend with whom I ride many hundred miles is a die hard campy fan and has experienced chain failure several times during our rides with several different campy 10 speed chains. Like you he is fanatical about his bikes and is quite knowledgable, having built all his bikes and wheels. All his bikes are very expensive and in immaculate condition. In every instance of chain failure the chain plates have cracked radially from the pin.

He is now trying out a wipperman chain, several thousant incident-free miles so far and he claims he's getting noticeably less wear.

I refrain from making any generalisations as this is far too small a sample to indicate an inherent problem with the campy 10 speed chain, I'm just saying (just in case its any consolation) that you're not the only one to have experienced this.

I hope you heal well, and soon.