This is not a back-end programming question. I can only modify the markup or script (or the document itself). The reason I'm asking here is because all my searches for appropriate terms inevitably lead to questions and solutions about programming this functionality. I'm not trying to force it via progrmaming; I have to find out why this PDF is behaving differently.
So: I have a bunch of links to PDFs on a page. Most of them open in new tabs, but one of them, the most recent, starts to open in a tab, but then the tab closes and the PDF gets downloaded as a file instead. All markup is consistent - there's nothing differnt about the odd-man-out except the actual URL.
You can see this here: http://calwater.mwnewsroom.com/Investor-Relations/Financial-Reports/Annual-Reports
All annual reports up to 2012 open in a new tab, but 2013 downloads instead.
This leads me to believe that there is some meta-data property of the PDF itself that tells it how to open, and that, in this case, the 2013 PDF was created using different settings.
Apparently, the PDF was saved out to PDF from InDesign.
Does anyone have any insight?