Texture object leak on quit

Trying to start to enable PostFX in t3d-bones, my really barebones script project. If I call FXAAFx.enable() when I enter the game, I get a popup on exit saying there's a texture object leak, and this in the console:

GFXTextureObject Usage Report - 1 active TOs
---------------------------------------------------------------
 Addr   Dim. GFXTextureProfile  ProfilerPath DebugDescription
 79146a8  ( 800,  600)  PostFxTargetProfile    MainLoop -> CanvasRenderControls -> GameRenderWorld -> SceneGraph_renderScene -> SceneGraph_batchRenderImages -> Scene_renderObjects -> RenderPassManager_RenderPass -> RenderPassManager_Render    mBackBufferCopyTex
----- dump complete -------------------------------------------
h:codetorque3denginesourcegfxgfxdevice.cpp(275) : Fatal - There is a texture object leak, check the log for more details.

Okay, so do I need to disable the PostFX on quit? I've tried calling FXAAFx.disable() in onExit() to no effect - however, if I type FXAAFx.disable();quit(); in the console, it reliably seems to not give me a warning. Is there some shutdown that happens before onExit that I need to pre-empt?

EDIT: Instead of binding quit() to escape, I've found FXAAFx.disable();quit();. Which reliably ensures there's no texture leak. What gives?