Course page for social sharing
There is an anti-social-network issue with Chamilo right now: when someone marks a page for "share" or "like" or "+1" or whatever and the course in which it is is not public, people following the link will get to an error page.
Instead, make a special hack to the course catalogue so when loading it with the course ID (numerical), it shows the course "box" with the "Description" and "Subscribe" button; only for the course in parameter.
Then hack the "Share icons" plugin to use this link instead of any other (even if the course is public, using another link in those two cases is just bad SEO practice).
This would make this plugin much more useful.