Hi, I know this is a really old thread but I just wanted to post a work-around I have just implemented.
I am running v2.7.2 and want to move a html block to the centre of my frontpage to display an embedded video from youtube. I was able to mimmick a block by using a label resource added to the center of my page. My label html code is attached.
I know its not ideal but it works! ;)