Find doesn't expand {}

[Todd M. Hoff]

Why doesn't this work:

    find . -type d -print -exec mkdir /xx/yy/zz/{} \;

The '{}' doesn't expand out to the filename like you might
expect. Yet this does work: find . -exec ls {} \;. '{} expands
to the filenames and the files are listed.

Why the difference?

Config: RTs running BSD 4.3.