Bug 6544963 was an annoying problem which could cause some virtual disks to lose their disk label when rebinding a domain, and the fcksum script had been provided as a workaround. This problem is now fixed in Solaris 10 8/07 which has recently been released; the fix for this problem is also available in the Solaris 10 patch 120011-14.

Solaris 10 8/07 and patch 120011-14 contain several other fixes for LDoms, you can check Liam's blog for details.