SYMPTOM: within mediaplayer: one specific albumart pic keeps popping up on files in a directory with numerous sound files and dir's

PROBLEM: hidden directories named .mediaartlocal are generated. On the path level where I think this goes wrong, I see numerous JPG's with the same pic in a subdir called .mediaartlocal. Removing .mediaartlocal-dirs only leads to refresh and remaking of the same.

SO FAR TRIED:
-removing the JPG's that show the same pic beneath the problematic dir. NO FIX
-command "tracker-processes -r" (as user). NO FIX
-removing the lot from the N900 and store it without this pic under a dir with a different name. NO FIX!

ASIDE:
-I noticed there is another dir that stores media info: .obex-root. However I think this is only shortcutting to the problematic dir
-Before, I tried to install MussorgSky. However, this app opens and immediately shuts down
-been reluctant to remove all .mediaartlocal dirs. They are hidden too so I wouldnt know how to do that either (f.e. in WinSCP)


I'm by now somewhat desperate (tho seeing this guys'stupid head with the word Asylum beneath it is exemplary..). Is the problem
-one pic too many, somewhere somehow?
-specifications of the song info itself?

Any ideas?
Tx in advance