Custom field type 'Label' does not behave correctly after JIRA 4.2

As known, after the version 4.2, the plugin "Labels" has been incorporated in JIRA's structure. It has caused some inconsistencies between the way in which a label custom field behaved before and how it works now.

The main issue here is:

JIRA 4.1.1:

• If a custom field type label is empty, it's still displayed on the issue view screen.

JIRA 4.4.1:

• If a custom field type label is empty, it's not displayed on the issue view screen - as the other custom fields behaves.

Basically, it's not outlined anywhere and tends to don't be an expected behavior:

Field displayed even with no data.

With an option, it works fine.

Otherwise, it's hidden.