Multiple attachments in the same posting

Hi.

My customer is running an RT instance (3.6.1), and “root” can add
multiple attachments in a single Reply/Comment, but his non-priv users
(his customers) can only do 1 attachment per Reply.

Can we fix this? We’ve looked all over for permissions, rights,
whatever, and can’t figure out what we need to do to make it work.

Thanks!
Sam