it works perfectly on my 3.0.7 (with a lot of other mods) By the way, take care, if you have a registred user, and gave him extra privileges, like administrator, it won't work, until you have to specify in this mod the original usergroup number (in my sample, registred user, not admin)
Exemple of html in my forum:
http://www.eovia3d.net/showthread.php?p=45814#post45814
The only problem I have is that this mod convert break page in the code to <BR> tags in html ! Then, you have to enter a one line html code !