Yes, I can in as admin No, user can't create item No, I can't an I can see, if I use -1 or an other number the last option enter is not save Yes, it work fine, but not with existing users
Ok, then there msut be a permission problem with your old clients. I will try to make a update installation and see if I can reproduce it.
I installed a 3.0.1.2 version, created clients and resellers and then updated it to 3.0.1.3 added another client and then updated to svn. All limits are working fine on this system. Please take a look at the database of your system, as new clients work but not old ones, please compare the record for a old and a new client in the client table, then compare the corresponding groups in the sys_group table and then the corresponding users in the sys_user table if you see any significant differences.
I solved the problem, it's due to group, my old client uses an unexisting group. I move user on their own group and now it work. Thanks Till for your very quick reply ^^