Spirit Background Image Not Working

Another day, another issue with Upfront, I am using the Spirit theme on a site and the background images are not showing in any of the regions. I even tried another Upfront theme but the background images for that don't work either. I have dealt with this before and it turned out to be a permalink issue, the permalink for this site is set to post name so it shouldn't be that, (been switching between post name/month and name), have used them in other Spirit themed sites and haven't had this issue. Please advise.

Take care,