Diana did have pierced ears. The "slight alteration" may have been something other than clip-to-post. Kate definitely has pierced ears as I've seen the wedding earrings on display at BP.
--Previous Message-- : : Ah! I assumed Diana had pierced ears. : Perhaps not. What of Kate? : : : --Previous Message-- : Ah yes, she has worn them several times. : : they say they were slightly altered for her. : : --Previous Message-- : Did anyone notice that in the new portrait : of : the Duchess of Cambridge, she appears to be : wearing Diana's sapphire & diamond : earrings, the ones that match her engagement : ring? : : : : http://www.princeofwales.gov.uk/news-and-diary/first-portrait-of-the-duchess-of-cambridge-unveiled-the-national-portrait-gallery : : : : : :