RPC problems

Hi,

After upgrading to Fedora 8,  RPC no longer seems to be working.  I can't  
get ypserv, ypbind, NFS to work anymore.

rpcbind seems to start happily, and rpcinfo will list it as working:

  program version netid     address                service    owner
     100000    4    tcp       0.0.0.0.13.93          portmapper superuser
     100000    3    tcp       0.0.0.0.13.93          portmapper superuser
     100000    2    tcp       0.0.0.0.13.93          portmapper superuser
     100000    4    udp       0.0.0.0.13.93          portmapper superuser
     100000    3    udp       0.0.0.0.13.93          portmapper superuser
     100000    2    udp       0.0.0.0.13.93          portmapper superuser
     100000    4    local     /var/r                 portmapper superuser
     100000    3    local     /var/r                 portmapper superuser
     100000    2    local     /var/r                 portmapper superuser


However, once I try and start ypbind, or ypserv I get a Unable to register  
(YPBINDPROG, YPBINDVERS,udp) in my log file, and a similary thing for  
ypserv.

I have tried to reinstall the rpms for rpcbind, ypserv,ypbind but it still  
fails. Any suggestions?