No, it will not stay as default, when set by admin. Re-booting causes machine to reset back to Safari & Preview. As mentioned before, this is an issue with network accounts, not local accounts. Everything works like it should locally.
We run 17 workstations via Apple v10.7.4 (Lion) OD home server. Our problem has been to allow network users to set Adobe Reader v10.1.4 and Firefox 15.0.1 as default apps, but once machine has been re-booted, default reverts back to Preview & Safari. If machines are not re-booted, then the new...