I noticed the HTML renderer is just another embedded Internet explorer implementation.
There is also HTMLLayout, a embeddable html renderer, which is far better in standard support and so on:
http://www.terrainformatica.com/htmlayout/
which is also free: http://www.terrainformatica.com/htmlayout/prices.whtm
Anyway, it would be great to also add this renderer to vvvv,