when i go to the site - i get sent to /export/index.php - its possible that that page has 0 pr - but the thailland.com does.
yeah seem like the site redirect the visitor to /exports/index.php by itself. I didn't notice that too. but could that be the case that made them lost PR for the http://www.thailand.com domain in google?
Wow, that's a real bummer... but the important bit is your serps - are you still getting good rankings for your main keywords?