I found that one of the German translators inserted many blank lines in the translated strings, which were not obvious at first sight when I was adding these to the language database. These cause many issues in the blocks/plugins (youTube, interactive graphs etc.).
I created a script which hopefully fixed all the problematic 141 German strings. It should work now, but you need to download the latest German language file (de.php) from the Translations page, which I updated just now.