Dear Roberto Gallicet,
Firefox
RenderRichDropDown = true - items are displayed outside the editor box (but work) This is normal behavior
RenderRichDropDown = false - items are displayed correctly (but don't working)
Can reproduce
On firefox there's another problem: when you click the second time a dropdown box, items remain visible Cannot reproduce
Opera
RenderRichDropDown = true - Css Class, Inline Style, Font Name and Font Size don't working - Paragraph, Links, Code Snippets and Images work
Can reproduce
RenderRichDropDown = false - entire editor hangs Cannot reproduce
We will investigate this issue which we can reproduce.
Thank you for asking