What do you call this on a website?

Firefox caches websites, which means it saves some files on your machine so that it doesn't have to re-download everything when you visit sites. If a website has updated their code, Firefox may still be using some of the old code along with some of the new, which can make a web page display incorrectly. To fix this, you need to clear the cookies and cache:

Click the menu button New Fx Menu , choose History and select Clear Recent History....

In the Time Range to clear: drop-down, select Everything.

Click the arrow next to Details to display the list of items that can be cleared.

Select both Cookies and Cache.

Click Clear Now.

Now that your cookies and cache are cleared, visit the website again to see if the problem is solved.

Check that JavaScript is not blocked

You should check whether you have an extension (such as NoScript) or Internet security program (such as a firewall, antivirus, or anti-spyware program) that can block JavaScript.

Check that your system clock is set correctly

In some instances the loading and verification of secure web content will be time-dependent, so you should check that date, time and timezone are set correctly on your system.

Clear Recent History.

Clear Recent History.

The style sheet is messed up...

Try reloading the page, sometimes your browser doesn't load the page correctly. However, this is a style issue. If it is your website then you need to fix any problems/errors in the style sheet.

As the images haven't loaded, it looks like its your connection.. Just reload the page.