Eearlier this year a dear friend of mine pointed out a little glitch in the 4Shared process.
This little check box appeard that allowed one to add the contet of the file they were viewing to their own 4Shared.
I was tinkering in my 4Shared the other day and found the FIX for that problem.
All you need to do is go to "My Account"
Make sure the little box next to:
"Allow others to add my files to their accounts."
is NOT checked.
Now you're good to go!
I hope that helps!