Using fallback suid method

Hi,

I'm getting the following message every time I login on the SugOS 5.3: Using fallback suid method.

Also the following 2 errors are logged:
Jun  1 19:19:01 slugos sshd[1276]: error: Could not get shadow information for
Jun  1 19:19:01 slugos sshd[1280]: error: setlogin failed: Function not implemented

I don't remember seeing this after installing the SlugOS, so I might have caused it.
Is any of you seeing it, or you might know the fix?

Thanks,
Corneliu