We installed the Smush.it plugin yesterday and it seemed to work correctly but today we get the Bad Response message from Smush.it.
Tried to smush images on https://www.smushit.com/ysmush.it/ the same way Tangcla did and received the same error message.
We have recently installed W3 Total Cache and, like mapleleaf33, we also have a .htaccess rewrite to https://www.
Seems the https rewrite is a likely culprit, but we are lacking in IT expertise and hesitant to change this if it isn’t the correct fix because of site security. Is it possible the .htaccess rewrite is the cause, and if so, is there a way to use Smush.it and maintain our https settings?