It wasn't working for me, but I did get it to work by clearing my browser caches, and by changing the forum style I use to the default. I noticed in Anne's message she mentioned that the default style had completed the upgrade.
Not just you, Hope. I just tried it, even replaced the text in the quick reply box, thinking that perhaps one only need to do that to use the box, but no -- it still told me to click a quick reply icon, which I had done and did again, to no avail.
Changing to the default style does help!
Hopefully I can change it back soon, I like the June contest colours Although, it makes me realise that not everyone uses the same colours as me and some colours I thought didn't work for sigs might work with other forum skins