Ive recently started using w3tc and all seems to be working great except it wont set the expiry for 3 particular images.
1. background image jpg
2. regular image jpg
i have a second css sprite image used for a different background which is fine, and other jpgs on the page which are all fine. Just these 2 and the favicon wont for some reason. Any suggestions? thanks.
all images as sensible sizes, saved for web from photoshop etc. nothing usual at all.