[Plugin: Comment Form Quicktags] Suggestion for WP Multisite Compatibility

In comment-form-quicktags.php

Remove

if (defined('WP_PLUGIN_URL')) {
			$this->plugin_url = WP_PLUGIN_URL . '/' . $this->plugin_name;
		} else {
			$this->plugin_url = get_option('siteurl') . '/' . PLUGINDIR . '/' . $this->plugin_name;
		}

And replace it with this:

$this->plugin_url = plugins_url() . '/' . $this->plugin_name;

http://wordpress.org/extend/plugins/comment-form-quicktags/