Hello,
I had the same problem with the parallax effect. I use two of them on the opening page. The first was good, but the second was only a grey image in Chrome.
I used the CSS given above and now both images can be seen in Chrome, too, but now the movement of the background images are much less then before, truly they move so little that hard to see (almost like normal pictures).
It can be seen on esszencianatur.hu site.
Could you check it for me please?
Thank you in advance.
p.s. I just see that the CSS modified the administrator view as well. E.g. in theme options some the fields cannot be seen for e.e. typography, etc. I see there was update yesterday on the template. How can I update my template?