Hi Perhaps I should have known this Perhaps I should be better at googling but this took me a while to discover Fully updated F13 client(milos) with users home directories NFS4 mounted on a fully updated Centos 5.5 NFS4 server (maui) Evolution (in particular) falls over if the NFS4 call back port has not been opened up on the client Solution Force the client to tell the server which port to use for call back ja@milos ~ 1$ cat /etc/modprobe.d/nfs.conf options nfs callback_tcpport=801 Open up the port on the client [root@milos ~]# cat /etc/sysconfig/iptables ... -A INPUT -m state --state NEW -m tcp -p tcp --dport 801 -s "server_ip_addr" -j ACCEPT ... I have no idea whether 801 is a good choice ! Symptoms Following a clean boot of the client and only after login of a user with home directory on the NFS4 server the server thows maui kernel: nfs4_cb: server "client_ip_addr" not responding, timed out No apparent problem until the user uses evolution Then the directories "can" become unreadable and evolution is unusable The server shows errors of the form Oct 13 11:14:55 maui kernel: NFSD: preprocess_seqid_op: bad seqid (expected 2787, got 2788) Oct 13 11:14:55 maui kernel: NFSD: preprocess_seqid_op: bad seqid (expected 2, got 3) Oct 13 11:15:45 maui kernel: NFSD: preprocess_seqid_op: bad seqid (expected 2787, got 2788 Hope this is useful to somebody John -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines