I have just upgraded my test site to:
Joomla 3.3.6
VM 3.0.6
OPC 2.0.282.210215
Since the upgrade, none of my Shipping Methods are appearing.
I think the Country ID is not being passed by OPC for some reason.
From debugging:
vmdebug Line 858 - shipmentmethod AusPost Parcel Service = FALSE for variable virtuemart_country_id = , Reason: Country 13 does not fit
I can give you access to the site if required.
Thanks
Brett