zfs discuss - Apr 2007 - problem mounting one of the zfs file system during boot

hello everyone, I have strange issue and I am not sure why is this happening.

syncing file systems... done
rebooting...

SC Alert: Host System has Reset
Probing system devices
Probing memory
Probing I/O buses

Sun Fire V240, No Keyboard
Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
OpenBoot 4.22.19, 8192 MB memory installed, Serial #65031515.
Ethernet address 0:3:ba:e0:4d:5b, Host ID: 83e04d5b.



Rebooting with command: boot
Boot device: /pci at 1c,600000/scsi at 2/disk at 0,0:a  File and args:
SunOS Release 5.10 Version Generic_125100-05 64-bit
Copyright 1983-2006 Sun Microsystems, Inc.  All rights reserved.
Use is subject to license terms.
Hardware watchdog enabled
Hostname: chrysek
/kernel/drv/sparcv9/zpool symbol avl_add multiply defined
/kernel/drv/sparcv9/zpool symbol assfail3 multiply defined
WARNING: kstat_create(''unix'', 0,
''dmu_buf_impl_t''): namespace collision
mypool2/d3 uncorrectable error
checking ufs filesystems
/dev/rdsk/c1t0d0s7: is logging.

When my system is booting it does complain about mypool2/d3
mypool2/d3 uncorrectable error

but when system boots and I do
[11:31:01] root at chrysek: /root > mount /d/d3
[11:31:06] root at chrysek: /root > df -k /d/d3
Filesystem           1k-blocks      Used Available Use% Mounted on
mypool2/d3           648755898 179354764 469401134  28% /d/d3

not a problem
no errors, not compain, so manual mount works just fine while zfs boot mount of 
it does not work.

this is the entry in vfstab that I have:
mypool2/d3      mypool2/d3      /d/d3   zfs     2       yes     logging

is there anything wrong that I do with it? As I said manual mount works just 
fine but during boot it complains about mounting it

[11:35:08] root at chrysek: /root > zfs list
NAME                   USED  AVAIL  REFER  MOUNTPOINT
mypool                 272G  2.12G  24.5K  /mypool
mypool/d               271G  2.12G   143G  /d/d2
mypool/d at 2006_month_10  3.72G      -   123G  -
mypool/d at 2006_month_12  22.3G      -   156G  -
mypool/d at 2007_month_01  23.3G      -   161G  -
mypool/d at 2007_month_02  16.1G      -   172G  -
mypool/d at 2007_month_03  13.8G      -   168G  -
mypool/d at 2007_month_04  15.7G      -   168G  -
mypool2                489G   448G    52K  /mypool2
mypool2/d3             171G   448G   171G  legacy

Regards,

Chris