I have FindNextByContext and FindPreviousByContext bind to Alt-Down/Up. I noticed that it wasn't finding all the references correctly. Happens in 1237 too.
The code is using the private implementation (pimpl or bridge pattern). I paste the relevant parts of the code only. When I select the wind_time_scale_ member variable and use FindNextByReference and FindPreviousByReference via the keyboard, VAX would always skip this particular line. Other areas of the variable are found, except this line.
class CImp
{
  float wind_period_		// control rolling effect
       ,wind_time_scale_;	// control wind strength
  void Setup_Shader (float time_passed)
  {
     // blah
     //THIS wind_time_scale_ VARIABLE IS ALWAYS SKIPPED
     float afTimeValues [4] = {shader_time_*wind_time_scale_, wind_period_, 0, 0};
     //blah 
    }
};