I downloaded "AdbeRdrUpd933_all_incr.msp" form both ftp://ftp.adobe.com/pub/adobe/reader/win/9.x/9.3.3/misc/ & http://www.adobe.com/support/downloads/thankyou.jsp?ftpID=4698&fileID=4417
There doesn't seem to be any difference between them and both of them work just as fine.
when I download from the Website I get a file of 8.040.960 Bytes. From the FTP it is 8.070.554 Bytes
Maybe it is a problem with a firewall or something...
At both downloaded files I can see in the properties:
Size: 8.040.960 Bytes
Size on Disc: 8.044.544 Bytes