Index: wp-admin/includes/update-core.php
===================================================================
--- wp-admin/includes/update-core.php	(revision 21466)
+++ wp-admin/includes/update-core.php	(working copy)
@@ -698,12 +698,12 @@
 
 	// See do_core_upgrade()
 	show_message( __('WordPress updated successfully') );
-	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%s">here</a>.' ), $new_version, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
-	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $new_version, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
+	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
+	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $new_version, 'about.php?updated' ) . '</span>' );
 	echo '</div>';
 	?>
 <script type="text/javascript">
-window.location = '<?php echo self_admin_url( 'about.php?updated' ); ?>';
+window.location = 'about.php?updated';
 </script>
 	<?php
 
Index: wp-admin/update-core.php
===================================================================
--- wp-admin/update-core.php	(revision 21466)
+++ wp-admin/update-core.php	(working copy)
@@ -354,12 +354,12 @@
 	}
 
 	show_message( __('WordPress updated successfully') );
-	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%s">here</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
-	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $result, esc_url( self_admin_url( 'about.php?updated' ) ) ) . '</span>' );
+	show_message( '<span class="hide-if-no-js">' . sprintf( __( 'Welcome to WordPress %1$s. You will be redirected to the About WordPress screen. If not, click <a href="%2$s">here</a>.' ), $result, 'about.php?updated' ) . '</span>' );
+	show_message( '<span class="hide-if-js">' . sprintf( __( 'Welcome to WordPress %1$s. <a href="%2$s">Learn more</a>.' ), $result, 'about.php?updated' ) . '</span>' );
 	?>
 	</div>
 	<script type="text/javascript">
-	window.location = '<?php echo self_admin_url( 'about.php?updated' ); ?>';
+	window.location = 'about.php?updated';
 	</script>
 	<?php
 }