Isn't this already covered in the cursoricon tests?

Stefan Dösinger wrote: 
I know this isn't a coded test, bot The Sims 2 behave in this way. This
    
was > previously stated WAY back on this list.
Yes, but do you know if Sims 2 behaves that way on Windows? There could be
some other bug triggering this behavior in Sims.

That's where a test helps even in these cases: If yout test shows that your
change is correct, it confirms the Sims behavior. If your test shows that
your change is wrong, you know that you found the wrong bug.