Index: wp-includes/media.php
===================================================================
--- wp-includes/media.php	(revision 21350)
+++ wp-includes/media.php	(working copy)
@@ -228,7 +228,7 @@
 	$class = 'align' . esc_attr($align) .' size-' . esc_attr($size) . ' wp-image-' . $id;
 	$class = apply_filters('get_image_tag_class', $class, $id, $align, $size);
 
-	$html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" title="' . esc_attr($title).'" '.$hwstring.'class="'.$class.'" />';
+	$html = '<img src="' . esc_attr($img_src) . '" alt="' . esc_attr($alt) . '" '.$hwstring.'class="'.$class.'" />';
 
 	$html = apply_filters( 'get_image_tag', $html, $id, $alt, $title, $align, $size );
 
@@ -660,7 +660,6 @@
 			'src'	=> $src,
 			'class'	=> "attachment-$size",
 			'alt'	=> trim(strip_tags( get_post_meta($attachment_id, '_wp_attachment_image_alt', true) )), // Use Alt field first
-			'title'	=> trim(strip_tags( $attachment->post_title )),
 		);
 		if ( empty($default_attr['alt']) )
 			$default_attr['alt'] = trim(strip_tags( $attachment->post_excerpt )); // If not, Use the Caption
Index: wp-admin/includes/media.php
===================================================================
--- wp-admin/includes/media.php	(revision 21350)
+++ wp-admin/includes/media.php	(working copy)
@@ -1519,11 +1519,6 @@
 		if ( '' == f.src.value || '' == t.width )
 			return false;
 
-		if ( f.title.value ) {
-			title = f.title.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
-			title = ' title="'+title+'"';
-		}
-
 		if ( f.alt.value )
 			alt = f.alt.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
 
@@ -1540,7 +1535,7 @@
 
 		cls = caption ? '' : ' class="'+t.align+'"';
 
-		html = '<img alt="'+alt+'" src="'+f.src.value+'"'+title+cls+' width="'+t.width+'" height="'+t.height+'" />';
+		html = '<img alt="'+alt+'" src="'+f.src.value+'"'+cls+' width="'+t.width+'" height="'+t.height+'" />';
 
 		if ( f.url.value ) {
 			url = f.url.value.replace(/'/g, '&#039;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');