Does this problem still exist in the newer versions of the OWC firmware?
While my SSD is not an OWC, I've been having this issue with my OCZ Vertex 2, also based on the Sandforce chip.
OCZ's most recent firmware (1.32) has fixed the issues related to hibernation (i.e. "safe-sleep") but the drive still has issues waking from timed inactivity sleep.
I wrote about it on their support forums in
this thread.
One of their support staff (who has been very helpful in ironing out the hibernation problems) replied with:
What "fully validated" means is beyond me.
Does this problem still exist for you OWC owners?