OS 7.0-CURRENT more information palced here http://lists.freebsd.org/pipermail/freebsd-current/2007-July/074592.html detaled siptom: i normally open a shar residing on ZFS without any files, but crash if not
*** Bug 4971 has been marked as a duplicate of this bug. ***
Closing, according to timur this is fixed as of 6.4-release and 7.1 release