How to narrow Doc ID 1396382.1 to my problem (liveupgrade + zones + zfs cloning)

Hello,
Though possibly by a different root cause I'm getting the "popular" problem below (again).

What I still didn't get is what item of Doc ID 1396382.1 I'm stumbling over?

# zoneadm list -cv
  ID NAME             STATUS     PATH                           BRAND    IP   
   0 global           running    /                              native   shared
  19 zclone3          running    /zones/zclone3                 native   shared
   - old-s8-1         installed  /zones/old-s8-1                solaris8 shared
   - old-s8-2         installed  /zones/old-s8-2                solaris8 shared
   - zbase            configured /zones/zbase                   native   shared
   - zclone1          installed  /zones/zclone1                 native   shared
   - zclone2          installed  /zones/zclone2                 native   shared

# uname -a
SunOS server 5.10 Generic_147440-19 sun4u sparc SUNW,Sun-Fire-V890

# showrev -p | grep 121430 | cut -c 1-17