Well, it seems like most of the Google Checkout integration errors and problems have been fixed in the latest release (1.1.3) - although, I did get one yesterday:
However, what I am trying to do is ship worldwide using Google Checkout - but when a buyer tries to pay using GC, they get a message that I do not ship to that country. I am based in the UK, and here is what Google Checkout support has told me:
In general, you may only ship orders to the country that your merchant account is associated with. For example, U.K. merchants will, by default, ship to the U.K. only.
The link they have sent does not seem to be working tho, but I have been able to find out that this can be achieved by using the <world-area/> tag in GC API. This does seem to be in the code, but for some reason, it’s not working.