image uploads - progressive jpegs
Yes, you'd just need to comment that line in the two places it's found in that file.
And anytime we thumbnail or modify images there might be a loss in quality, but it should be mostly not noticeable. There's a setting in /data/settings.dat.php for advanced > imageResizeQuality that sets the quality value for http://php.net/manual/en/function.imagejpeg.php to 80. This is a little higher quality then the default.
Why do you need to disable progressive images?
Just to be clear - I do prefer the new default progressive image processing!
In this case I have a client who isn't happy with the resolution of a couple of their uploaded images, despite having image quality settings at "Maximum". I've requested from them a full-resolution original image for my evaluation and testing. Being able to turn off progressive mode will help me eliminate that as a cause of degradation.
Thanks for the reply and I'm all set for now.