Problem with deleted thumbnails, how to restore album covers and photo gallery?
 

Hi all. I've decided to clean my N900 from old and unused files via filebox, so i've deleted files in /home/user/.thumbnails/cropped and in /home/user/.cache/media-art.
I knew that thumbnails in photo gallery and in Open media player were willing to be cancelled, but i hoped that rebuilding tracker's databases the thumbnails will be recreated.
That didn't happened after refreshing media libriaries and rebooting the device.
How can i fix my problem?
Thanks in advance.