--- a/content/base/public/nsIContent.h
+++ b/content/base/public/nsIContent.h
@@ -71,18 +71,18 @@ enum nsLinkState {
   eLinkState_Unknown    = 0,
   eLinkState_Unvisited  = 1,
   eLinkState_Visited    = 2,
   eLinkState_NotLink    = 3
 };
 
 // IID for the nsIContent interface
 #define NS_ICONTENT_IID       \
-{ 0x5788c9eb, 0x646a, 0x4285, \
-  { 0xa2, 0x8c, 0xde, 0x0d, 0x43, 0x6b, 0x47, 0x72 } }
+{ 0x32b94ba0, 0x1ebc, 0x4dfc, \
+ { 0xba, 0x8c, 0x5f, 0x24, 0x2b, 0xcb, 0xaf, 0xce } }
 
 /**
  * A node of content in a document's content model. This interface
  * is supported by all content objects.
  */
 class nsIContent : public nsINode {
 public:
 #ifdef MOZILLA_INTERNAL_API

--- a/content/base/public/nsINode.h
+++ b/content/base/public/nsINode.h
@@ -272,18 +272,18 @@ private:
 #define DOM_USER_DATA         1
 #define DOM_USER_DATA_HANDLER 2
 #ifdef MOZ_SMIL
 #define SMIL_MAPPED_ATTR_ANIMVAL 3
 #endif // MOZ_SMIL
 
 // IID for the nsINode interface
 #define NS_INODE_IID \
-{ 0x2a8dc794, 0x9178, 0x400e, \
-  { 0x81, 0xff, 0x55, 0x30, 0x30, 0xb6, 0x74, 0x3b } }
+{ 0x4776aa9a, 0xa886, 0x40c9, \
+ { 0xae, 0x4c, 0x4d, 0x92, 0xe2, 0xf0, 0xd9, 0x61 } }
 
 /**
  * An internal interface that abstracts some DOMNode-related parts that both
  * nsIContent and nsIDocument share.  An instance of this interface has a list
  * of nsIContent children and provides access to them.
  */
 class nsINode : public nsPIDOMEventTarget,
                 public nsWrapperCache
@@ -683,17 +683,16 @@ public:
    */
   nsIPrincipal* NodePrincipal() const {
     return mNodeInfo->NodeInfoManager()->DocumentPrincipal();
   }
 
   /**
    * Get the parent nsIContent for this node.
    * @return the parent, or null if no parent or the parent is not an nsIContent
-   * Implemented in nsIContent.h
    */
   nsIContent* GetParent() const {
     return NS_LIKELY(GetBoolFlag(ParentIsContent)) ?
       reinterpret_cast<nsIContent*>(mParent) : nsnull;
   }
 
   /**
    * Get the parent nsINode for this node. This can be either an nsIContent,