Given the file size, this should have taken about 8 seconds to download ... instead, it finished before I could open the download progress page.  (as in, too fast). 

As you can see from the error popup message, winZIP didn't like the file very much. 

Additional information ...

Extracting to "C:Documents and SettingsMartin DiehlLocal SettingsTemp"

Use Path: no Overlay Files: yes

Extracting RenderosityMediaKit2007August.pdf

bad CRC f5ec4013 (should be 66235cd5)

Warning: the size of the extracted file (12282674) does not match the uncompressed size (12282620) recorded in the zip file

Some things to check ...

1. Have your programmers tell you the correct CRC. 

2. Has your new ISP created any caching proxy servers for your outbound traffic?  Those don't play very well with dynamically created web pages. 

--
Martin