NTFRS

I have 2 domains. In 1 of them in the folder \winnt\sysvol\sysvol and
\winnt\sysvol\domain there are a lot of folders duplicated with
"_NTFRS_<some hex #>. For example:

I have:
\Policies and another folder \Policies_NTFRS_.....
\Profiles and another folder \Profiles_NTFRS_.....
\Scripts and another folder \Scripts_NTFRS_.....

Also inside the regular \Profiles folder there are some duplicate users
folders with the "_NTFRS_"

We were having some replictions problems a while back that turned out to be
a DNS issue. That havs been fixed and all seems well now. Except for these
folders. All these folders have very old dates.

Is it safe to delete these folders/content???
If not, how can I clean this up?

Thanks,
John