Broken images (country flag, browser icon, etc.)


I recently enabled https on my Piwik installation - added SSL, and forced https by changing the config file. Everything works fine, Piwik is tracking web clicks. However, all the images (country flag, browser icon, sparklines, etc.) on my Piwik page refuse to load now. This is what it looks like:

I looked around for a solution, but nothing helped.
Any help would be appreciated.