Go to com_media
select (using the checkboxes at the images) some images
try to hit the delete button.
In 3.4.1 all images gets deletet.
In 3.4.2/3 nothing happens
The delete button can be found here:
So that button call this: https://github.com/joomla/joomla-cms/blob/staging/media/media/js/mediamanager.js#L39
But I'm not sure what is the next step or what fails as it looks correct for me.
|Closed_Date||0000-00-00 00:00:00||⇒||2015-07-04 13:15:39|