Still there are some differances when I clalcule MD5 
over the UTL which is in the list and when the files 
named to the URL is saved to the disk. Where can it 
came from? About 1% difference at about 50,000 URLs.
And looked a bit and discovered that there are some 
URLs which has Caps in the domain name, which are 
md5 calculated assuming lowercase letters for the 
domain.?