2
Looks to me like the theme isn't rendering.
I've seen this on two occasions:
1. With a new theme. Cure by going to admin>preferences and switching on "Check for new templates".
2. Whilst waiting for a new sub-domain to become active after my host's server reloaded. Cure = time!
Is the hosting computer able to "share" all the themes information? Sorry, I don't know the tech terminology. Firewall issue, perhaps?