Some versions of IE have issues when downloading PDF files under HTTPS
and cache-control headers do affect this. Google for more info.
I'm not familiar with PD4ML but if you're having concurrent request
issues then you should check you're not doing something in your code
which is causing the prob
response.setHeader("Pragma", "public");
response.setHeader("Cache-Control", "max-age=0");
response.setContentType("application/octet-stream");
response.setHeader("content-disposition", "attachment;
filename=yourfile.pdf");
And don't use window.open(). Just use direct link.
-Original Message--
