If you already updated your Joomla! 1.7.0 to Joomla! 1.7.1 then you probably noticed that logout procedure doesn't work correctly in Core Design Login module.

Solution:

Please open default.php file in the following directory:
/modules/mod_cdlogin/tmpl/default

Replace line 71.

Before:

<input type="hidden" name="return" value="<?php echo $return; ?>" />

After:

<input type="hidden" name="return" value="<?php echo $return; ?>" />
<?php echo JHtml::_('form.token'); ?>

Fix for this issue is part of update for Core Design Login module version 2.0.2