Hi!
Not the CSS is broken, there is one “</div>” too much in the code.
Quick Fix (until next update):
– go to plugins in your admin area
– Click “edit” for Awesome FlickR Gallery
– be sure you edit “awesome-flickr-gallery-plugin/index.php” (You see on almost on top what you are editing), if it’s not that file, select it from the filelist on the right
– scroll down to the bottom of the code (inside the editor)
– in the fifth to last row it says $disp_gallery .= "</div>";
– add //
at the beginning of the line (so it says //$disp_gallery .= "</div>";
– Click “Update file”
Worked for me …