/etc/init.d/nfs invokes /sbin/rpc.rquotad from nfs-utils package, however that deamon is not working remotely (via quota command) with aquota.user files. The /usr/sbin/rpc.rquotad daemon from the package 'quota' works perfectly. I've changed the nfs init script to use /usr/sbin/rpc.rquotad.
Fixed and marked stable in nfs-utils-1.0.1-r1 Thanks!