Capturing a change in rotation?

The changed event can capture all sorts of changes like scale and shape etc. It doesn't seem to be able to capture a change of rotation made by the user via the editor. Does anyone know how to capture this change?

With a timer and a global variable, remembering the last rotation value and either testing for equality or testing for difference using something like:

float EPSILON = 0.01;
integer dirDiff(vector n1, vector n2)
{
   return (1.0 - n1*n2) >= EPSILON;
}
integer rotDiff(rotation r1, rotation r2)
{
   if (dirDiff(llRot2Fwd(r1), llRot2Fwd(r2)))
   {
      return TRUE;
   }
   if (dirDiff(llRot2Left(r1), llRot2Left(r2)))
   {
      return TRUE;
   }
   if (dirDiff(llRot2Up(r1), llRot2Up(r2)))
   {
      return TRUE;
   }
   return FALSE;
}

Yeah I was afraid I'd have to do something like that. Thanks for the pointer.