How cool is this for a bug. Dead easy to replicate and potentially very deadly! Basically it is possible to pass parameters toa pdf doc to do things to it. Check out this link (http://www.disenchant.ch/blog/hacking-with-browser-plugins/34)
Would seem it only affects Adobe Reader 6.x and 7.x. On my vista machine it tells me of an issue loading the page and I get the option to reload it and that takes off everything after the #
Stefano Di Paola and Giorgio Fedon have discovered some vulnerabilities in Adobe Reader, which can be exploited by malicious people to conduct cross-site scripting attacks, cross-site request forgery attacks, cause a DoS (Denial of Service), or to compromise a user’s system.
1) Input passed to a hosted PDF file is not properly sanitised by the browser plug-in before being returned to users.