This issue is present in the newly released Squeeze. Using kernel: 2.6.32-5-amd64
nfs-common: 1.2.2-4 nfs-kernel-server: 1.2.2-4 Workaround is by downgrading to lenny's version of nfs-comon and nfs-kernel-server: nfs-common: 1.1.2-6lenny2 nfs-kernel-server: 1.1.2-6lenny2
