changing a non-cardtype to a cardtype sometimes results in broken linkage with cardtype. this also happened to me when renaming a cardtype card.
shows up as error in *type card search and other uses as "No class name for cardtype name ..."
breaks edit, delete.
would be surprised if this weren't a duplicate.
yup - add extensions when cardtype is changed
--John Abbe.....Fri Aug 21 13:10:57 -0700 2009