gistfile1.diff

diff --git a/blocks/html/block_html.php b/blocks/html/block_html.php
index f030401..cd3edc8 100644
--- a/blocks/html/block_html.php
+++ b/blocks/html/block_html.php
@@ -87,9 +87,11 @@ class block_html extends block_base {
         global $DB;
 
         $config = clone($data);
-        // Move embedded files into a proper filearea and adjust HTML links to match
-        $config->text = file_save_draft_area_files($data->text['itemid'], $this->context->id, 'block_html', 'content', 0, array('subdirs'=>true), $data
-        $config->format = $data->text['format'];
+        if (is_array($data->text)) {
+            // Move embedded files into a proper filearea and adjust HTML links to match
+            $config->text = file_save_draft_area_files($data->text['itemid'], $this->context->id, 'block_html', 'content', 0, array('subdirs'=>true), $
+            $config->format = $data->text['format'];
+        }
 
         parent::instance_config_save($config, $nolongerused);
     }