When I share a Facebook entry appears a random image that this on the page, and with a title element < title/>
When I debug the link "Open Graph Object Debugger" says the following error message:
Meta Tags In Body
Your page has meta tags in the body instead of the head. This may be because your HTML was malformed and they fell lower in the parse tree.
Please fix this in order for the tags to be usable.
At the bottom of the page have the option "See exactly what our scraper sees for your URL". When I look at the code, the Facebook Server scrap the URL and the banner of uCoz who is forced appears before the opening tag of the element <html>
Suggestion of how the uCoz should fix this bug
For the Uran browser, uCoz don't shows the forced banners. The system detects the Uran through the user agent the browser.
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2272.76 Safari/537.36 u01-04
I recommend doing the same with facebook since I also use a user agent to scrap the URL.