Missing Nodes in group policy editor

Hi,

I seem to be missing a couple of nodes in my group policy editor.

Missing nodes are Deployed Printers and Internet Settings from the User Config and Deployed Printers from the computer config.

At first I thought a replication issue as these nodes are visible on other DCs and when adding GPOs and AD entries these are created on the faulty DC.

There are no errors in the event logs however the GPOS that are configured using these nodes are not applying on the affected computer.  Other GPO are applying fine.

Anyone seen this before?

Thanks

Tom