True, but to me thats a likely answer, as those errors usually occur on low-spec hardware, but sometimes there are other reasons, I admit.
My reasoning is:
* The Goron mask uses motion blur (which uses the framebuffer).
* Jabo's Direct3D8 plugin uses several render-to-texture driver caps to perform hardware-accelerated framebuffer rendering at zero speed loss.
* Most low-end video cards don't support those driver caps in DX8/DX8.1, and as such, when they try to use them , they fail.