I have a site where I'm using City Magazine Theme from ThemeForest / ThemesMania and the theme is failing (intermittently) to render completely and sometimes fails totally to connect. Great looking theme, but I must'a done something wrong here ...
This issue has been reproduced by Hostgator from multiple locations. Connections are solid. Speeds are good.
The site has been moved to local hosts, multiple servers in multiple locations and still gets the same results.
The site has been re-installed multiple times with the same results.
The site has been reviewed by Drupal Users groups in San Francisco and Baltimore ... same results.
It is not a connection problem as all other sites perform normally from the test servers and user locations.
Sadly, the themesmania guys are not responding ... At least not yet!
All engineers who have looked at this are scratching their heads ... and pointing at something to do with the theme.
Running on 6.x Drupal and all modules are up-to-date.
Anybody have clues as to why intermittent incomplete rendering would be occuring???
!! ** Great theme! Probably in wide distribution and successful, but something is out of whack in this picture.
/*** Comments/suggestions/clues are all greatly appreciated. *****/
-C-
Very usual issue with themes. Open developer console in your browser and look for HTTP errors while trying to get page resources.
Theme creators sometimes put CSS, JS or images on external resources that are slow to respond or did not respond at all. I saw issues when theme trying to load JS file, that is on top of the page (that prevents page from loading).
Also theme creators like to use counters, your page trying to access some slow URL and behaves very strange. Just remove all external requests or make them local (if we talk about necessary resources).
Hope this helps.