Currently trying to work on my tutorial. Sadly all over the website (at least in the chat and in the tutorial submitter) the multiply sign * is interpeted as a control code and omitted in the text. I think it is as soon as there are two or more multiply signs in one line (which happens quite often if you present a formula). Also, if trying to use the code icon of the tutorial submitter, the text is still converted, and instead of the multiply signs you see the control code, e.g. '<em>', '</em>', etc.