This
nsv bug is still open. It effected me
like this. I don't know what other effects it may have on OACS packages as I don't use a lot of them (I'm just getting starting with OACS).
Also, it looks like the Site Map returning "no data" or "broken url" is AOLServer4 specific (I haven't run earlier AOLServer versions with OACS but others have commented that it worked).