Steps to reproduce the issue

On a site updated from 3.3.3 to 3.3.4 in pre-production loaded browser tried to clear cache: system--> clear cache the menu doesn't load fully with the "delete" and other options. Ran this test in both Firefox and Safari with the same result.

Expected result

Expected to select the "Cache Group", and select delete, but the tool bar with those options didn't load.

Actual result

Menu bar partially loaded, on the right hand side you can see the top of a !joomla graphic but nothing else loads.

System information (as much as possible)

Bug found on Firefox 32.0.2 Firefox 32.0.3 and Safari 7.0.6 (9537.78.2) running on Mac OSX 10.9.5

Additional comments

See the screen shot to see the menu not loading and not giving a delete option.