I believe I am using the same version we just bought this the other day and downloaded it then. Maybe it is that I load it using loadhtml , maybe it is because more text, either way I see the slowness right now in this control here, not when I click the font dropdown but when I click around and backspace. It does do this in our project with alot of text in the control with the font control and sometimes it just does it blank. I try to check version of the Dlls in my bin directory they all say version 0.0.0.0 in the properties.