Look what I get when I try to access that PDF. I tried it with Firefox, with Internet Explorer and Google Chrome, all of them the newest versions and
on Win 7 64bit:
Sadly, your client "Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:22.214.171.124) Gecko/20110303 (GMX/1.6.2) Firefox/3.6.15 ( .NET CLR 3.5.30729;
.NET4.0E) ;ShopperReports" violates the automated access guidelines posted at arxiv.org, and is consequently excluded.
If you are using the PDF Plug-in, it has many bugs and is forbidden here due to problems it causes at the server end. You must confirm that you have
disabled it before access can be restored.
In Netscape try Edit -> Preferences -> Navigator -> Applications, look for Portable Document Format and uncheck the plug-in box. Or delete the pdf
plugin dll file from the Program Files/Netscape/Navigator/Program/plugins directory and restart browser. Or for Acroread4/Explorer5 users, go into
Acroread's File : Preferences : General : Web_Browser_Integration and make sure the little box is unchecked.
Note to MacOSX users: There is a bug in the Acrobat reader which causes it to make endless streams of requests after having successfully downloaded
the full pdf. Note that it is not necessary to use Acrobat at all, since pdf's from here render as well or better in the default Preview.app on
MacOSX. If for some reason you think you need to use Acrobat, go to Acrobat Preferences -> Internet and turn off the "Allow speculative downloading
in the background" option, which comes (incorrectly) turned on by default, and whose behavior is quite broken.
If you believe this determination to be in error, see arxiv.org...
for additional information.