Index: wp-admin/includes/plugin-install.php
===================================================================
--- wp-admin/includes/plugin-install.php	(revision 9674)
+++ wp-admin/includes/plugin-install.php	(working copy)
@@ -383,7 +383,8 @@
 	$plugins_allowedtags = array('a' => array('href' => array(), 'title' => array(), 'target' => array()),
 								'abbr' => array('title' => array()), 'acronym' => array('title' => array()),
 								'code' => array(), 'pre' => array(), 'em' => array(), 'strong' => array(),
-								'div' => array(), 'p' => array(), 'ul' => array(), 'ol' => array(), 'li' => array());
+								'div' => array(), 'p' => array(), 'ul' => array(), 'ol' => array(), 'li' => array(),
+								'img' => array('src' => array(), 'class' => array(), 'alt' => array()));
 	//Sanitize HTML
 	foreach ( (array)$api->sections as $section_name => $content )
 		$api->sections[$section_name] = wp_kses($content, $plugins_allowedtags);