On https://sourceforge.net/p/allura/wiki/Allura%20Wiki/ these links show up red but they shouldn't:
[Install and Run Allura](/p/allura/git/ci/master/tree/README.markdown)
[Poster from PyCon 2011](Allura Wiki/attachment/PyCon_2011.pdf)
They didn't use to show up red until the Markdown upgrade a little while ago. It seems like relative URLs like the first should never be red. And attachments could be checked to see if they exist.