Found a way to fix it. Its really stupid of me to have failed to realize this earlier. After your comment on plugins, I tried turning off the legacy plugin and the bookmarks now work perfectly on the homepage.

However, when I'm on an article page, it seems that it doesn't work for me again. When mousing over the bookmark icons, the correct address shows up in the browser's statusbar but after clicking it, the new windows opened has the "http://corpusjuris.santosestrella.com/" address is appended before the proper link. Thus, bringing me to a 404 page.

I've triple-checked my plugins and I don't think there's anything there modifying the site's behavior anymore. Should I edit the source code itself?