Hi Erik,
I have a similar error when trying to upgrade from 3.0.5 to 3.1.0.
I checked and re-checked again, I used Filezilla for a recursive 777 on the www/images/ directory and I can visually see that all files and subfolders of www/images/ are 777, I also executed without error the SSH command given by upgrade wizard :
... but I'm still blocked
Any idea what else I could try ?
Thanks a lot
Regards,