I have the exact same problem as Javier. I also use ISPConfig and our www-data user is in about 934 groups.
This fix http://people.canonical.com/~chiluk/lp1176215/ did not help in my case.
I have the exact same problem as Javier.
I also use ISPConfig and our www-data user is in about 934 groups.
This fix http:// people. canonical. com/~chiluk/ lp1176215/ did not help in my case.