php error in new install

Hi.

I use WP2.0 to host a blogg on Gentoo. And i just made another blogg, on my same private server. Followed the installation. The blog works fine, but now i have installed the widgets plugin and activated it. When i now go and move a widget into my sidebar, and then hit the “edit” button, to enter text in a text widget(or any other widget). I get this error in the edit window that pops up:

Code:
Warning: call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, ” was given in /home/hula/public_html/wp-content/plugins/widgets/widgets.php on line 645

Dident get this on on my other blogg, so kinda confused now.

plugins/widgets/widgets.php

Code:
<div id=”controls”>
<?php foreach ( $registered_widget_controls as $name => $widget ) : ?>
<div class=”hidden” id=”<?php echo $widget[‘id’]; ?>control”>
<span class=”controlhandle”><?php echo $name; ?></span>
<span id=”<?php echo $widget[‘id’]; ?>closer” class=”co$
<div class=”controlform”>
<?php call_user_func_array($control[‘callback’], $control[‘params’]); ?>
</div>
</div>
<?php endforeach; ?>
</div>

the “php foreach” is line 645