I have upgraded a SharePoint, excatly same code, but now links to pdfs always prompt to save and dont open from within the browser (which they do on the old server)

old server is named: `localintranet`
new server is my local machine: `myserver:3200` (yes its on port 3200)

Any ideas?

I did try adding my server to the list of local intranet machines in internet explorer to no avail.

I have tried both `href=file.pdf target=_blank` and `onclick=window.open('file.pdf');return false;` in the anchor tag

driving me nuts!