Missing nnif.dll in Domino 6 installation

We recently installed Domino R6 on a new Windows 2000 server and noticed that one of our agents was erroring out. It was using the nnif.dll to perform some of its processing, but the file was not found anywhere on the server after the installation.

We simply copied the file from an R5 server and the agent worked fine.

Was this dll file replaced with something else that we should be using instead or is this just an ommissions in the install process?