diff --git a/ChangeLog b/ChangeLog
index f540e8c0c..3dff0b8f2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,7 +2,8 @@
 
 	* UI/WebServerResources/MailerUI.js (configureLoadImagesButton):
 	retrieve all "img" elements with an "unsafe-src" attribute and
-	remember them in an array attached to $("messageContent").
+	remember them in an array attached to $("messageContent"). We also
+	void using "delete" on the stored array because IE 7 is too dumb.
 
 	* UI/MailPartViewers/UIxMailPartHTMLViewer.m
 	(-startElement:namespace:rawName:attributes:): treat tag names as
diff --git a/UI/WebServerResources/MailerUI.js b/UI/WebServerResources/MailerUI.js
index 28bc4f705..264d37852 100644
--- a/UI/WebServerResources/MailerUI.js
+++ b/UI/WebServerResources/MailerUI.js
@@ -1189,7 +1189,7 @@ function onMessageLoadImages(event) {
             img.src = img.getAttribute("unsafe-src");
         });
 
-    delete content.hiddenImgs;
+    content.hiddenImgs = null;
     var loadImagesButton = $("loadImagesButton");
     loadImagesButton.setStyle({ display: 'none' });