Finally, a stable "dependent field" solution
The Conditional Fields beta is a breath of fresh air after years of buggy, incomplete contrib solutions for dependent field functionality in CCK. It is simple to configure and reasonably stable. It could use some more features, but even just the basic functionality is a huge step forward in node form usability.
The module does have some bugs, particularly related to fields that aren't bundled with CCK itself. However, in many cases, patches for other field types are available for testing in the module's issue queue.
Necessary Module especially for Nodeprofile
Hi there, I use the Conditional Fields for the registration with the (node_profile).
After installing, for every field is a tab "Conditional field", here you can choose if this field will show up when a user selected a certian term.
Very useful for registration and many other content types.
I´d like to have the ability to turn on/off the requirement for fields too.