3.3 foobars my rich text category editor toolbar

I’ve been using the code below to add a rich text edit toolbar to my category editor. Its worked flawlessly up to the 3.3 release. What do I need to change to make it compatible with 3.3?

`Up until today’s update, the code below has worked flawlessly to add a rich text editor control to the category description editor. Today it stopped working after updating to 3.3

Any clues what to tweak here?

[Code moderated as per the Forum Rules. Please use the pastebin]