TYPO3 Core

In the current version of Typo3 6.2 Backend-Layout icons are not displayed. Instead
placeholder images for "missing icon" are shown.

This is caused by the new TYPO3\CMS\Backend\View\BackendLayout\DefaultDataProvider that
returns '/upload/media/' as icon path (see method 'getIconPath($icon)'). In older versions
like v6.1.5 the icon path was read from TCA-array by the FormEngine class and prepend with '../'.

The problem is that the getIcon($icon) method of FormEngine prepend 'gfx/' if the given
icon path doesn't start with "EXT:" or "../". So Typo3 tries to read the icon from
"gfx/upload/media/" that fails.