JCH-Optimize Pro Sprite Generator changes some of your icons!

Earlier today I turned on the Sprite Generator from JCH-Optimize Pro and had to turn it off because it immediately changed some of your icons. The sprite generator has the ability to exclude images which is what I will need to do with your images. I am hoping you can tell me which directory or directories have the images that I will need to exclude. Right now the Sprite generator is OFF but I want to turn it back on soon. Just would prefer not to change your icons! :-)
Sean Carney
PS. Those icon images are from the EasySocial Stream module displaying on my home page.