Below are two MWEs. The only difference is with \setupinteraction. When the resulting link is copied from the pdf and pasted into a browser, one can see that there is a trailing / added to the interactive version, but not to the non-interactive version. For this url (and many others), that causes a 404 failure. Additional experimentation shows that a second / is not added when a trailing slash has been provided. This is not the case with TL2013. It is the case with 2014.03.28 15:04 MKIV beta. Why has the trailing slash added? Is this an intentional change? If so, is there a method to invoke the older behavior. \starttext \useURL[aurl][http://www.mieleusa.com/manuals_pdf/Residential/Ovens/H387-2_us.pdf] \from[aurl] \stoptext \setupinteraction[state=start] \starttext \useURL[aurl][http://www.mieleusa.com/manuals_pdf/Residential/Ovens/H387-2_us.pdf] \from[aurl] \stoptext -- Rik