bug#22105: 25.1.50; REGRESSION - `modify-frame-parameters'

[Drew Adams]

> > Done.  Drew, please check and tell me which are the remaining issues
> > also wrt bug#16028 and bug#16923.
> 
> Drew, did this fix your problems here?

No, this is still broken - since October 2015.  I have tried
a few times to track this down (spent quite a while on it),
but I have not had a block of time to do it successfully.

It is also the case that the behavior, although still broken,
has changed several times since then - quite different
breakages, due to changes in the Emacs code (I have not
changed my code).

That is another reason that I have not found the time or
energy to track this down completely: it kept changing,
as other users reported problems that were similar or 
(I assume) related.

I still hope to get to the bottom of this.  And it seems
that the changes of the Emacs code have quieted down now.