The only way I have found to access pdf files on network drives is to disable protected mode.
Which is safer, leave our users at 9.4.1, or upgrade to X and disable protected mode?
Is the network share DFS/NFS? If so, the 10.0.1 update rolling out today should address that. (see http://kb2.adobe.com/cps/860/cpsid_86063.html#main_Unsupported_configurations)
Retrieving data ...