function.array-merge</a>]: Argument #1 is not an array in /var/www/includes/form.inc on line 800.

Getting this error:

function.array-merge</a>]: Argument #1 is not an array in /var/www/includes/form.inc on line 800.

Only when I combine CCK links, Bio, and FormTweak. Uninstalling FormTweak removes this error. The watchdog message:

Type	php
Date	05 Oct 2008 - 08:33
User	Ipsum Lorum
Location	http://localhost/?q=link/widget/js/bio/field_bio_links
Referrer	http://localhost/?q=node/39/edit
Message	array_merge() [<a href='function.array-merge'>function.array-merge</a>]: Argument #1 is not an array in /var/www/includes/form.inc on line 800.
Severity	error