Heads up! This content is more than six months old. Take some time to verify everything still works as expected.
I recently need to create a CCK version of a previously taxonomy driven
process on a node type. While at this I discovered the various things
that have to be changed to make it happen. A big piece of the puzzle
was the caching process from drupal. Once created, a node is cached
cache_content table in a serialized form.
If you do any changes, you need to clear the cache so the next time it's loaded (for editing or viewing) drupal rebuilds the cache.