Index: wp-admin/update-core.php
===================================================================
--- wp-admin/update-core.php	(revision 12108)
+++ wp-admin/update-core.php	(working copy)
@@ -160,8 +160,9 @@
 	<tbody class="plugins">
 <?php
 	foreach ( (array) $plugins as $plugin_file => $plugin_data) {
+		$status = is_plugin_active($plugin_file) ? 'active' : 'inactive';
 		echo "
-	<tr class='active'>
+	<tr class='$status'>
 		<th scope='row' class='check-column'><input type='checkbox' name='checked[]' value='" . esc_attr($plugin_file) . "' /></th>
 		<td class='plugin-title'><strong>{$plugin_data->Name}</strong>" . sprintf(__('You are running version %1$s. Upgrade to %2$s.'), $plugin_data->Version, $plugin_data->update->new_version) . "</td>
 	</tr>";