This is what I think could be happening. I could be wrong. There are many things I don't know and this could be a new syntax I'm not familiar with.
Please try something for me. Go to the link you provided and view the page. Then right click on the page and view the source. You will see there is no html on the page to generate an image or even a background color.
What is different is that their server handles that error message without redirecting you to an error page as hostgator does.
Try this on your server - go here an view the page source
www.screenvision.lv/templates/agency/images/backgrounds/-1 Try this on their server. - go here and view the page source
demo.joomlaxtc.com/agency/templates/agen...mages/backgrounds/-1 Look at this page, where there is a picture, and see the difference.
www.screenvision.lv/templates/agency/ima...nds/insetwrap-s1.png'
I would think that if the link ending in -1 were a good link, it would produce the same thing as the third example ending with a valid file name.
So I am supposing, when the browser tries to get the image on their server, it doesn't have to load anything. On your server it has to take the time to parse an entire page and all its dependencies. And it has to do it for every time that image is called on the page and can't load, and that eats up a lot time.
Now, using firefox, open their demo page at
demo.joomlaxtc.com/ Right click on the background and choose inspect element.
Find the url link in the style page and mouse over it.
You will get the same message that you see in the attached image, "Failed to load URL". They are having the same problem you are, they solved it in a different way.
If you think their link is correct, please contact joomlaxtc and find out how they are making a link like that work. It's a technique I don't know, but would be glad to learn what it is all about.
Regards,
Ed