When going to the checkout page, there should be a menu in the left hand column but instead it just displays ^AssetProxy(somepath);
Doesn't appear to hinder checkout.
Does "somepath" exist on their site?
http://hosted_company.com/somepath?
If not, it can't be asset proxied.
Not sure what changed, but this appears to be resolved. Perhaps a biproduct of an upgrade that happened recently.
Closing this.