La Blanka Ĉinĉilo

I'm having one of my websites redone and moved to a new host, and I always find little issues with these content management systems regarding Opera, e.g. trying to drag and drop a photo while building a web page is easy with Internet Explorer or Firefox, but impossible with Opera.

If you know of a content management system for websites that works best with Opera, let me know ASAP. Much appreciated. :-)