Hi. I've just created my first ePub using InDesign. But I ran into a problem re: images. Let me say that this ePub is graphic heavy with both photos and illustrations. When I preview my book in Kindle Previewer, all the images were severely distorted vertically (except in DX mode where all images were brought to full page width regardless of size, but without distortion).
KDP instructed me to unzip and change the CSS size from fixed to 100% X automatic. Got the word from InDesign Secrets re: the scripts from this site.
I've been trying without success to download the Zip Unzip scripts from Mobileread, but I keep getting a "File is damaged - Move to trash" message.
I am running OSX 10.9.5
I would appreciate any input.

Pub date approaching!