I’ve run into something a bit weird when adding group members.
I initially created a queue called “Support”, a group called “Support”, then
a user called “damian” to test with. Once I had satisfied myself that RT
was at least functional, I started creating users for other support people
to play with. When I tried to add them to the Support group, I get a
"Member added" message for each user, but no user was actually added. To
make sure it wasn’t configuration, I removed myself, then tried to add
myself – same thing. So I created another group – same thing.