Index: wp-includes/js/thickbox/thickbox.js
===================================================================
--- wp-includes/js/thickbox/thickbox.js	(revision 23446)
+++ wp-includes/js/thickbox/thickbox.js	(working copy)
@@ -20,7 +20,7 @@
 
 //add thickbox to href & area elements that have a class of .thickbox
 function tb_init(domChunk){
-	jQuery(domChunk).live('click', tb_click);
+	jQuery('body').on('click', domChunk, tb_click);
 }
 
 function tb_click(){
Index: wp-admin/js/plugin-install.js
===================================================================
--- wp-admin/js/plugin-install.js	(revision 23446)
+++ wp-admin/js/plugin-install.js	(working copy)
@@ -27,7 +27,7 @@
 
 	$(window).resize(function(){ tb_position(); });
 
-	 $('#dashboard_plugins a.thickbox, .plugins a.thickbox').click( function() {
+	$('#dashboard_plugins, .plugins').on( 'click', 'a.thickbox', function() {
 		tb_click.call(this);
 
 		$('#TB_title').css({'background-color':'#222','color':'#cfcfcf'});