Clear keywords button not working.

I’m building a site from the default MODx installation site. If you goto the manager and click on any container, then click Edit > META Keywords, by default it has the following keywords:
content management system
Front End Editing
login
MODx
Below the keywords is a button ’Clear keywords’.
I’ve highlighted the keywords and clicked this button, but they are not cleared. I’ve tried this on the latest Safari and FF on OSX and the latest IE and FF in WinXP. I’m running 0.9.6.1 rev 3118. How do I clear those keywords?

You may have found a bug. Honestly, you’ll have a lot better time managing meta content using TVs since you can do cool things like @EVAL, @INHERIT, use PHx and so on.