A quick post on the current - and final - solution to use TinyMCE3 with Qt:

HTML Text Editor - final solution

by Jens Weller

From the article:

In the last post about my HTML Text Editor, I mentioned that while the editor worked like it should, other things didn't. I was able to fix at least some of the driver related issues, but kept seeing random crashes. So I decided to try out a different solution, instead of going on a long and tiring debugging trip.