[KLUG Members] permissions query

[Eric Beversluis]

I've got a directory which is owned by root but a member of group users.
'eric' is a member of users. The directory has permissions 770. As I
understand it, this means I should be able to read, write and execute
the directory. But it won't let me, claiming I do not have the necessary
permissions. 

When I change permissions to 775 I can get access to the directory. Is
there something else necessary other than being a member of the group
that has rwx permission?

EB