>
> I guess the idea is that you should invoke it with `C-x C-M-0'?  But 
> that seems to have another problem with the patch - when I type it I 
> get:
>

Thanks.  This bug is fixed in the attached patch.

>> Also, the two function now scale super-duper differently. :-/
>
> Do you mean 'text-scale-adjust' and 'global-text-scale-adjust'?  I see 
> the same here.
>

Yes.  As I said earlier, global-text-scale-adjust scales smoothly, and 
text-scale-adjust scales fast.  That was a design choice when implementing 
global-text-scale-adjust.  It should of course be possible to make 
text-scale-adjust scale smoothly too.