Looks like the NFS and slow login issue is due to NFS now requiring GSSD. I seem to have solved it by setting ‘NEED_GSSD=yes’ in /etc/default/nfs-common on both client and server, and rebooting both.
The Cardo issue appears to be a problem with the font. I found a bug related to it on Red Hat:
Using Fontforge to edit the OS/2 Metrics to the values specified there, and similar values for the bold font, appears to have solved the problem. The italic font appears to always have been OK.