Forms with Network Users (Mac OS X)

I'm having great difficulty with a Acrobat Pro X form. This all worked last year with Acrobat 9 but a number of system changes have forced me to change the way in which I'm doing things.
 
Here's where I'm up to:
 
The form itself is fine. It is published and recieving responses from my account on my Mac (which is local and admin).
 
The distributed PDF is on a network share (Mac AFP share) with what I believe to be the same permissions as before (read only to most users).
  
Here's the problem:
 
When I submit the form from the account that installed Acrobat on a client Mac everything works. When I submit it from a network account (be it an admin or limited account) the pop up dialog appears for the email address and clicking send removes it. The form never reaches the tracker. (this is not the recent problem with the tracker. I've had to wait for that to be fixed before I could test this.)
 
I've checked just about everything I can think of. I've even copied the ~/Library/Application Support/Adobe/Acrobat/10 folder from the admin account to the user accounts.
 
I was thinking that it might be related to the problem in 9x where we had to redirect a folder but I'm stuggling to find any more information.
 
Any thoughts?
 
Thanks.