See, even open source authors can be dicks about copyright! (As if there were any doubt.. ;P)

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Lawmeme operates its website using PHP-Nuke, a GNU/GPL application used to maintain blogs. Ever since our inception, Lawmeme has used PHP-Nuke (since version 5) because it is rich in features, fast, and supported by the open-source community. However, some PHP- Nuke users and the author appear to have become angry at Lawmeme because we have removed a copyright notice from the footer of the page template.

PHP-Nuke's default setting is to display the following notice at the bottom of each page that it generates:

Web site engine's code is Copyright © 2002 by PHP-Nuke. All Rights Reserved. PHP-Nuke is Free Software released under the GNU/GPL license.

This default setting wasn't always so. When Lawmeme originally used PHP-Nuke, the footer was fully customizable via the administrator's interface. Naturally, we changed the footer to meet our site's needs. As PHP-Nuke was found to have numerous cross-site scripting vulnerabilities, we began to upgrade to the most recent versions of PHP-Nuke. With every upgrade came new features, and after heavily modifying PHP-Nuke's code to fit our needs, some of the upgrade scripts didn't work correctly. In fact, the most recent upgrade, where configuration settings are stored in a database, never copied the copyright statement.

Read on for more details.

LawMeme: Feature - PHP-Nuke's Copyright Notice