Yes, you're right DrByte. The cause are those .DS_Store files.
Removing them manually is a very hard work. I found this terminal command (for osx) that should remove ALL of them from my hd:
sudo find / -name ".DS_Store" -depth -exec rm {} \;

Then, I moved the cleaned store folder on linux server and...now it's working at 50%. Now I can see the main page, items and everything but I still have the same error. I can't log into admin too.
I double checked about .DS_Store files and there is no one.
Really don't know what else could be the cause.