diff --git a/layout/base/nsCaret.cpp b/layout/base/nsCaret.cpp
index aa9419f8635..1bda957fbf8 100644
--- a/layout/base/nsCaret.cpp
+++ b/layout/base/nsCaret.cpp
@@ -178,7 +178,6 @@ nsCaret::nsCaret()
 #endif
 , mLastContentOffset(0)
 , mLastHint(nsFrameSelection::HINTLEFT)
-, mLastFrameOffset(0)
 {
 }
 
@@ -301,7 +300,6 @@ void nsCaret::Terminate()
   mPresShell = nsnull;
 
   mLastContent = nsnull;
-  mLastFrame = nsnull;
 }
 
 //-----------------------------------------------------------------------------
@@ -505,8 +503,8 @@ nsIFrame * nsCaret::GetCaretFrame(PRInt32 *aOffset)
   if (!mDrawn)
     return nsnull;
 
-  // Recompute the frame that we're supposed to draw in if the cached frame
-  // is stale (dead).
+  // Recompute the frame that we're supposed to draw in to guarantee that
+  // we're not going to try to draw into a stale (dead) frame.
   PRInt32 offset;
   nsIFrame *frame = nsnull;
   nsresult rv = GetCaretFrameForNodeOffset(mLastContent, mLastContentOffset,
@@ -742,16 +740,6 @@ nsCaret::GetCaretFrameForNodeOffset(nsIContent*             aContentNode,
                                     nsIFrame**              aReturnFrame,
                                     PRInt32*                aReturnOffset)
 {
-  // Try to see if we can use our cached frame
-  if (mLastFrame.IsAlive() &&
-      mLastContent == aContentNode &&
-      mLastContentOffset == aOffset &&
-      mLastHint == aFrameHint &&
-      mLastBidiLevel == aBidiLevel) {
-    *aReturnFrame = mLastFrame;
-    *aReturnOffset = mLastFrameOffset;
-    return NS_OK;
-  }
 
   //get frame selection and find out what frame to use...
   nsCOMPtr<nsIPresShell> presShell = do_QueryReferent(mPresShell);
@@ -912,8 +900,6 @@ nsCaret::GetCaretFrameForNodeOffset(nsIContent*             aContentNode,
   }
   *aReturnFrame = theFrame;
   *aReturnOffset = theFrameOffset;
-  mLastFrame = theFrame;
-  mLastFrameOffset = theFrameOffset;
   return NS_OK;
 }
 
diff --git a/layout/base/nsCaret.h b/layout/base/nsCaret.h
index 2f43cff5dcb..74346d81986 100644
--- a/layout/base/nsCaret.h
+++ b/layout/base/nsCaret.h
@@ -293,11 +293,8 @@ protected:
                                               // actually drawn (anon <BR> in text control)
     PRInt32               mLastContentOffset; // the offset for the last request
 
-    nsFrameSelection::HINT mLastHint;         // the hint associated with the last request, see also
-                                              // mLastBidiLevel above
-
-    nsWeakFrame           mLastFrame;         // the last frame on which the caret has been drawn.
-    PRInt32               mLastFrameOffset;   // the frame offset for the last caret position
+    nsFrameSelection::HINT mLastHint;        // the hint associated with the last request, see also
+                                              // mLastBidiLevel below
 
 };