Well... everything is fine when you attach image if there weren't any before. But I want to change my existing cover to another embedded in ID3tag.
I've tried first just remove cover.jpg from directory, embed pics into tags and "tracker-processes -r" but it still shows my previous cover. Then I tried removing files (including .mediaartlocal subdirectory) and copy it again into device, restarting it, changing filenames, directories and even tags. Nothing worked...
Media player still finds its magic way to find the old cover and attach them instead of the new one.

Though I must sayd that when the song is playing, the album cover is the new one embedded in file, but in the album or artist view it stays old one...

Maybe media player stores some informations about it on the system partition. If this is the case, where are they and how to change them...?