Yes... all text widgets from the widget demo run fine for me on El Capitan with snapshots of revised tktext from a few days ago.

(Log-in problem synopsis - i view the ticket page without logging in. Then i log in, and am redirected away from the ticket page. Using the browser history (firefox and safari were the same), i then go back to the ticket page and page refresh. This behaviour would normally work with most web sites and then keep me logged in and able to edit the page, but is not working for me here. Sorry for the hassle.. but obviously  i have sorted it out enough to be able to post. Cheers)