diff --git a/content/base/public/nsIContent.h b/content/base/public/nsIContent.h
index 112962d97b59..e32f7e88e48e 100644
--- a/content/base/public/nsIContent.h
+++ b/content/base/public/nsIContent.h
@@ -61,8 +61,8 @@ class nsIURI;
 
 // IID for the nsIContent interface
 #define NS_ICONTENT_IID       \
-{ 0x0b762446, 0x041f, 0x46cf, \
- { 0xb4, 0x6e, 0x98, 0x65, 0x4a, 0x5a, 0x7c, 0x37 } }
+{ 0x1666277a, 0xf6f1, 0x4c7e, \
+ { 0xb0, 0x63, 0x95, 0x77, 0x53, 0xd2, 0xac, 0x52 } }
 
 /**
  * A node of content in a document's content model. This interface
diff --git a/content/base/public/nsIDocument.h b/content/base/public/nsIDocument.h
index 60dcb5018e1e..0df03915ca1f 100644
--- a/content/base/public/nsIDocument.h
+++ b/content/base/public/nsIDocument.h
@@ -96,8 +96,8 @@ class nsIDOMUserDataHandler;
 
 // IID for the nsIDocument interface
 #define NS_IDOCUMENT_IID      \
-{ 0x3bff36cc, 0xc546, 0x4af0, \
- { 0xa4, 0xa3, 0xc4, 0x64, 0x0b, 0xe7, 0x03, 0xb6 } }
+{ 0xf529a315, 0xb4ea, 0x449c, \
+ { 0x93, 0x44, 0x8a, 0xf8, 0x93, 0xfe, 0x6c, 0x4e } }
 
 // The base value for the content ID counter.
 // This counter is used by the document to 
diff --git a/dom/public/idl/core/nsIDOMUserDataHandler.idl b/dom/public/idl/core/nsIDOMUserDataHandler.idl
index 2305574e7187..d9e0f01a7714 100644
--- a/dom/public/idl/core/nsIDOMUserDataHandler.idl
+++ b/dom/public/idl/core/nsIDOMUserDataHandler.idl
@@ -41,7 +41,7 @@
 
 // Introduced in DOM Level 3:
 
-[scriptable, function, uuid(5470deff-03c9-41b7-a824-e3225266b343)]
+[scriptable, function, uuid(91afebdd-a201-4db0-b728-9d59580f0cfd)]
 interface nsIDOMUserDataHandler : nsISupports
 {
   // OperationType