Hi, I have the same problem. I designed some css for a testimonial. In text editor I can add it perfectly. But not all of the website users are using textmode. Most users prefer the visual editor. Here I have the list with my quicktags. I can select the right entry but nothing happens. In text mode I can see that the tag wasn`t there. If I create text in text mode the tag is inserted by clicking the quicktag entry. If I change to visual editor than, the text in quicktag tags including the tags itself clear away.
Can you help me please?