[support] Files directory permissions

[Fred Jones]

My admin/settings/file-system page says that /files and /tmp are not
writable unless I give them 777 via FTP. I am no genius, but isn't
that a bit of a security risk? I thought 775 should be enough?

Should I ask the host to try to fix this? This host was chosen by my
client, however, as he wanted hosting in England, and like all other
English hosts, they are a bit thick. To say the least.

Thanks,
Fred