On 2/28/16 3:37 PM, John Wiegley wrote:
> At some point I recall someone adding a feature to emacs-25 that would show a
> yellow triangle in the middle of the frame instead of flashing the border.
> 
> I'm finding that against a white background full of text, this yellow triangle
> is not visible enough, so I often don't realize that an error is occurring.
> 
> How do I return to the frame-flash of Emacs 24.5?

I think that was changed due to this bug:

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21662

The original code didn't work on OS X 10.11 (it was a bug in Mac OS X [1]).

-David


[1] http://debbugs.gnu.org/cgi/bugreport.cgi?bug=21977