Other CCK-native fields (with identical settings) were removed, but the e-mail field (part of the email module CCK field) was not.
My guess is that it is not using the standard [field][0][#value] element structure (which I have a feeling I have noted before when theming this field type).

Comments

yched’s picture

yched commented

Yes, some contrib CCK modules do not respect the expected structure for their widgets. Usually they do not behave right when included in a fieldgroup as well.

This is probably a bug that should be filed against the offending field modules.