Editor change Answered
I've just released a new version of Instructables, with a new updated version of the rich text editor. Also, we set the default for comments to not use rich text, because most comments don't need it; but you can click the 'rich text' button if you want to use formatting in a comment.
The new editor looks a little different but works basically the same. As always, Pro users do have a greater range of formatting options. It has a couple nicer features than the previous one (e.g. you can paste directly into it) and runs a bit faster. We hope you will find it an improvement too; please let us know of any problems you may encounter with it!