Presented at Access 2014, winner of poster contest.OpenURL has been a stalwart in the arsenal of Librarianship for many years now, but it is getting a bit long in the tooth, and cracks in the façade are showing. How well does it still stack up? In the fall of 2013 Brock University Library started looking at the reported errors generated through our OpenURL system to answer this question. By making a clever hack [1] to the error report mechanism it was possible to log all the malevolent OpenURLs in a database to see what the problem was. The end result is a corpus of around 1000 reported URLs [2] that were meticulously examined [3] to find the problem. In the end numerous things were discovered: - Some of the OpenURLs worked just as...