Block Alignment Error Upgrading to 9.1

[ByteTamer]

I got the following error a couple of days after upgrading to 9.1.0 from 8.3 in the local security run output.

Code:

freenas.local kernel log messages:
+++ /tmp/security.rPbW1Lx1      2013-08-19 03:01:02.000000000 -0600
+Solaris: WARNING: Disk, '/dev/gptid/8b9ce5a0-d9e2-11e1-afb2-0017314751c7', has a block alignment that is larger than the pool's alignment
+
+Solaris: WARNING: Disk, '/dev/gptid/8c311d5b-d9e2-11e1-afb2-0017314751c7', has a block alignment that is larger than the pool's alignment
+
+Solaris: WARNING: Disk, '/dev/gptid/8cc8256f-d9e2-11e1-afb2-0017314751c7', has a block alignment that is larger than the pool's alignment
+
+Solaris: WARNING: Disk, '/dev/gptid/8d5c4b25-d9e2-11e1-afb2-0017314751c7', has a block alignment that is larger than the pool's alignment
+

I've never received the error since then. Is this something I need to worry about?