For starters, he was banned as a "Catholic theologian" even by the Novus Ordo for rejecting the dogma of papal infallibility and the very Magisterium.
http://www.vatican.va/roman_curia/congregations/cfaith/docuмents/rc_con_cfaith_doc_19750215_libri-kung_en.html
Okay, good to know, you too, "Minnesota", I know he talked and wrote a whole lot of mess, but I was a bit hazy about the particulars. He wasn't exactly bedtime reading for me (not suggesting that any of present company engaged in this either), my tastes have always run more TAN Books, Douay Bible, and so on. To paraphrase what William F Buckley Jr said about Harvard faculty and the Boston phone book, I'd feel safer directing my spiritual and moral life from the first thirty books in Thomas Nelson's catalog, than to look to the entire present college of (Novus Ordo) bishops. (Not that this would be saying much.)