The "Thumbnail For Excerpts" is working only on some of the images in our feed.
Some of the thumbnails are just the original images re-sized/scaled down to the thumbnail size. Let me explain...
When you right-click > properties on a few of the images you'll notice some are correct thumb files while others are the original larger images... scaled. This increases bandwidth and loading time.
Any idea why this is not working on all images?
All our post are pretty identical art features, all images are .jpg and we use photoshop's "save for web" on all images, so not sure where else to turn.
Also, I've checked and the thumbnails files are there so not sure why the larger files are being used for some.