[rt-users] enabling 'take' action in unowned tickets window

[Dario Luis Coneglian Oliveros]

How do I get 'take' action to be availabled at unowned tickets window ?
When logging as admin, this action does appear along each ticket on this 
window.
However when a different user logs in, the same does not happen.
This user belongs to a group that has been granted privileges to make 
any changes to tickets, queues and global information.
If this user does a search and selects a unowned ticket from the 
results, then he(she) will be able to take the ticket.
BTW, I am running RT 3.6.0.
Any guess ?
Thanks,
Dário