Hi, first I'd like to say Dolphin is amazing. I never used a file manager which is clear and powerful. congratulation. At the additional information menue you can choose what you show in the file manager. You can turn everything on/off, without the file name. Most of the time the filename is realy importand, but sometimes (picture and movie) not. To be consistent the file name should also be includet into the additional information configuration. than you can make also some nice viewes for mobile devices where you only have place for the contend and not for the filename. (https://dl.dropboxusercontent.com/u/1642456/vdg/Dolphin/AdditionaInformation.jpg) the hover effect is not related to this bug only an additional idea in the linked picture.
I'm sorry I find the bug report for this. Sorry I also search before I write the bug. please delete this report. *** This bug has been marked as a duplicate of bug 302622 ***