Saw a tweet saying that websites that open external links in new browser windows make themselves look insecure – “please don’t leave me for someone else”. I loved the description. I’m a believer in letting users control when things open in new windows but as with anything there are exceptions and linking to PDFs is one that I can live with – but then I think that’s the fault of the PDF format and the fact it has it’s own user interface, but that’s a rant for another day.