I get the following message using it with TinyTinyRSS (v1.10, on Fedora-20):
"This TinyTinyRSS source is not self-updating and Liferea does not support updating TinyTinyRSS remotely at the moment. ..."
In fact my tinytinyrss IS SELF-UPDATING via a cron job as described under "Periodical updating from crontab, using update script (update.php --feeds)" in http://tt-rss.org/redmine/projects/tt-rss/wiki/UpdatingFeeds
The message is annoying. Furthermore, liferea does not update the feeds anymore. I have to restart liferea to see new feeds.