--- a/mailnews/base/prefs/content/AccountManager.js
+++ b/mailnews/base/prefs/content/AccountManager.js
@@ -1324,16 +1324,23 @@ function setFormElementValue(formElement
   }
   else if (type == "textbox") {
     if (value == null || value == undefined) {
       formElement.value = null;
     } else {
       formElement.value = value;
     }
   }
+  else if (type == "label") {
+    if (value == null || value == undefined) {
+      formElement.value = "";
+    } else {
+      formElement.value = value;
+    }
+  }
 
   // let the form figure out what to do with it
   else {
     if (value == undefined) {
       if ("defaultValue" in formElement && formElement.defaultValue)
         formElement.value = formElement.defaultValue;
     }
     else