After a bit of testing, it seems there's still many bugs inside the HTML parser. To be true it will only work with the simplest examples of HTML code. This only applies to the HTML parsing feature of this software, which is used only if you want to rapidly create Yahjf objects or Yahjf java source code from HTML ; this does not apply to the core subset of this software for which there is no known bugs for now. In other words, you can without known problem use this software for the purpose of generating HTML and modifiying it programmatically, but you'll have either not to use the parser and create your Yahjf objects from code, or discover by yourself the limitations of the parser and parse only code that it is able to handle.