Oops, shipped a stack memory overwrite we did

 Vec unpackedTransform[4];

#if defined(SPU)
    vecLoadHalf8(unpackedTransform[0], unpackedTransform[1], &sourceTransform->data[0]);
    unpackedTransform[2] = vecLoadHalf4(&sourceTransform->data[8]);
#else    
    // get alignment errors with both vecLoadHalf8 and convertHalfToFloat array, so use naive but working method instead
//  convertHalfToFloat(reinterpret_cast<float*>(unpackedTransform), &sourceTransform->data[0], 12);
    for (uint i=0; i<24; i++)
        reinterpret_cast<float*>(unpackedTransform)[i] = convertHalfToFloat(sourceTransform->data[i]);
#endif