Like so: #0 imgRequestProxy::Clone (this=0x644a610, aObserver=0x21d2fd70, aClone=0xbfffa72c) at /Users/bzbarsky/mozilla/vanilla/mozilla/modules/libpr0n/src/imgRequestProxy.cpp:481 #1 0x0031e3b2 in nsImageLoader::Load (this=0x21d2fd70, aImage=0x644a610) at /Users/bzbarsky/mozilla/vanilla/mozilla/layout/base/nsImageLoader.cpp:132 #2 0x0031e6a2 in nsImageLoader::Create (aFrame=0x5623910, aRequest=0x644a610, aActions=2, aNextLoader=0x0) at /Users/bzbarsky/mozilla/vanilla/mozilla/layout/base/nsImageLoader.cpp:90 #3 0x003325dd in nsPresContext::SetupBackgroundImageLoaders (this=0x5156600, aFrame=0x5623910, aStyleBackground=0x5623870) at /Users/bzbarsky/mozilla/vanilla/mozilla/layout/base/nsPresContext.cpp:1353 #4 0x002e7d61 in nsCSSRendering::PaintBackgroundWithSC (aPresContext=0x5156600, aRenderingContext=@0x21dbfad0, aForFrame=0x5623910, aDirtyRect=@0x543c084, aBorderArea=@0xbfffa9d8, aBackgroundSC=0x5623408, aBorder=@0x69a6960, aFlags=0, aBGClipRect=0x0) at /Users/bzbarsky/mozilla/vanilla/mozilla/layout/base/nsCSSRendering.cpp:2265 I wonder whether we can flag, somehow, that we've already created the relevant imageloaders... We'd have to clear the flag when our background image actually changes, though.

This is the other half of the cause of bug 552538, right? (in addition to bug 552605)

Hmm. Yeah, I guess so.