[rt-users] Missing "take" link for some users

[Keith Edmunds]

RT 3.6.1

We have four users on this system. In "10 newest unowned tickets", one
user has the ticket number as a link and also a 'take' link; the other
three users have only a plain-text ticket number and no take link.

At first I thought this was down to permissions, but I have granted one
use full global permissions and there has been no change.

Where should I be looking to try to resolve this?

Thanks,
Keith