GUI updates in Guidance
I was going through the usability report about Guidance a month ago and saw this comment at the end of the report:
4.3 Checkbox feedback
When the user checks or unchecks the checkbox "Start during boot", the corresponding entry in the list on the left side is updated (e.g. from "yes" to "no"). This is hard to notice, since the mental focus is on the checkbox, not on the list. Therefore, a stronger visual indication about the change is helpful.
(Report is here BTW, http://www.openusability.org/reports/?group_id=166 )