--- a/gfx/layers/d3d10/LayerManagerD3D10.cpp
+++ b/gfx/layers/d3d10/LayerManagerD3D10.cpp
@@ -626,21 +626,24 @@ LayerManagerD3D10::VerifyBufferSize()
     mSwapChain->GetDesc(&swapDesc);
 
     if (swapDesc.BufferDesc.Width == rect.width &&
         swapDesc.BufferDesc.Height == rect.height) {
       return;
     }
 
     mRTView = nsnull;
-    if (gfxWindowsPlatform::IsOptimus() ||
-        gfxWindowsPlatform::IsRunningInWindows8Metro()) {
+    if (gfxWindowsPlatform::IsOptimus()) { 
       mSwapChain->ResizeBuffers(1, rect.width, rect.height,
                                 DXGI_FORMAT_B8G8R8A8_UNORM,
                                 0);
+    } else if (gfxWindowsPlatform::IsRunningInWindows8Metro()) {
+      mSwapChain->ResizeBuffers(2, rect.width, rect.height,
+                                DXGI_FORMAT_B8G8R8A8_UNORM,
+                                0);
     } else {
       mSwapChain->ResizeBuffers(1, rect.width, rect.height,
                                 DXGI_FORMAT_B8G8R8A8_UNORM,
                                 DXGI_SWAP_CHAIN_FLAG_GDI_COMPATIBLE);
     }
   } else {
     D3D10_TEXTURE2D_DESC oldDesc;    
     if (mBackBuffer) {