Hi, When I'm building QuickBook docs locally for Boost.Log, I'm seeing errors like the following in the end: Error: no ID for constraint linkend: "log.design". and so on for basically any section id that is used in the QuickBook [link] tag. In the resulting HTML documentation all such links point to the root directory where the HTML docs are located. Looking at the bin.v2/libs/log/doc/log_doc.xml file, for example, for the log.detailed.sink_frontends.sync is, it looks like <link> tags use the id that is specified in QuickBook: <link linkend="log.detailed.sink_frontends.sync"> but the actual section has a colon in front of the id: <section id=":log.detailed.sink_frontends.sync"> Is this a known issue and is there a workaround? I'm using DocBook XML from the Kubuntu package, which has version 4.5-9, and a freshly built QuickBook from develop. I used to build docs locally fine before, and did not change the configuration since, but I may have upgraded Kubuntu since I last built the docs. Thanks.