We're on version 11.0.6721.0.
Maybe it's the HTML sanitization? You can go to Administration » Settings » Advanced » Security. Check the Disable HTML sanitization checkbox. If you don't want to completely disable all sanitization, you can whitelist items (I haven't tried this):
Sounds like you are using MVC. The editor settings in the basic settings section only applied to the RadEditor, i.e. webforms mode. In MVC mode you are using the Kendo editor.
You have two options:
2) If you really hate this and want to disable it, you can go to the source code repository and download the "sf-html-field.js" file and put it in your ResourcePackages/yourpkg/client-components/fields/html-field folder so it will override the built-in file. I don't remember what the line is that you have to change to disable the auto-script scrubbing so you might have to do some more searching to find it. I decided not to do this, because once you do it you are signing on to MANUALLY manage that file from now on. Every time you do a version upgrade you will need to compare the new version of this file to your version and copy in any updates.
Bwilson - I tried this. We already had it turned off for other purposes, though. Thanks for helping!
Gaunt - thanks, I'll give that a try!
Turns out that the listener was being started up, the problem was how Sitefinity was handling the actual stuff I was doing in my function. Thanks for the help, gents!