I just uploaded a new version which hopefully fixes the problems. The DoF will still look wrong on some systems but other than that it should work now.
It would be nice if those having problems with the previous version could test this one and tell me if the heat refraction and the water are working all right now.

You can download it here: http://files.filefront.com/DemoLevel+V052rar/;10091541;/fileinfo.html

Thank you