files became readonly!!

[Johan Ask]

Hi, i have a big problem. all my files on the / partition became read-only!
What the heck should i do? it happened after i was using a newly installed thirt-party-package names albumart ( Album Cover Art Downloader ) I also did an upgrade but i dont know which packages that upgraded...

I have googled a bit but find nothing. Someone have any idea what caused this and what to do about it?