Post custom fields and metakey starting with _

[arena]

custom fields with metakey starting with _

should not be in the 'Edit post' page even if hidden !!!

[arena]

btw, weird behavior when trying to insert a new custom field !!

[scribu]

Please be a little more descriptive: steps to reproduce etc.

[arena]

try to insert a custom field in an existing post !!!

[dd32]

Fields starting with an underscore are hidden fields. They're not displayed in the UI at all, such key names are usually used by WordPress Core and plugins to store information about the post which is not useful to the end user.

The current behavior is weird, in the sense that no feedback is given to the user that their field has been inserted.

Not allowing hidden fields from being set via the UI will remove a functionality some people may use (primarily developers)..

[scribu]

Now I get it.

Hidden custom fields = non-public custom fields.

Just like we don't allow users to create non-public post types from the UI, we shouldn't allow creation of non-public custom fields either.

For example, a sneaky user could cause trouble by setting a custom field he's not supposed to set.

[arena]

I also tried to insert a custom field and i have a very strange behavior.
Looks like the ajax stuff is broken

[arena]

seems to be fixed in 3.0.1 beta 1