You can `sending us an email with the article's URL <mailto:hello@wallabag.org>`_.
Or you can also try to fix this problem by yourself.
You can try to see if it works here: `http://f43.me/feed/test <http://f43.me/feed/test>`_ (it uses almost the same way as wallabag to retrieve content).
If it works here and not on wallabag, it means there are something internally in wallabag that breaks the parser (hard to fix).
If it doesn't works, try to extract a site config using: `http://siteconfig.fivefilters.org/ <http://siteconfig.fivefilters.org/>`_ (select which part of the content is actually the content).
You can test it **f43.me** website: click on **Want to try a custom siteconfig?** and put the generated file from siteconfig.fivefilters.org.
Repeat until you have something ok.
Then you can submit a pull request to `https://github.com/fivefilters/ftr-site-config <https://github.com/fivefilters/ftr-site-config>`_ which is the global repo for siteconfig files.