Index: image_annotate.module
===================================================================
--- image_annotate.module	(Revision 11)
+++ image_annotate.module	(Arbeitskopie)
@@ -121,6 +121,15 @@
 }
 
 /**
+ * Implement hook_form_alter
+ */
+function image_annotate_form_alter(&$form, &$form_state, $form_id) {
+  if ($form_id == 'comment_form' && arg(0) == 'image-annotate') {
+    unset($form['preview']);
+  }
+}
+
+/**
  * Return permissions for editing/creating annotations for the current user
  */
 function image_annotate_user_access($aid = 0) {