"Error: nfs_flush_file_handle_cache_dir: rmdir(/inboxes)" log spikes

[Joseph Tam]

I received a bunch of these log messages at a rate of a few thousand per hour
for one of my users -- she may have max'd out her quota.  The directory is
a NFS directory containing mbox formatted INBOX's.

Other than alleviating the space crunch, is there any particular action I
need to take?

Joseph Tam <jtam.home at gmail.com>