Version: (using Devel) OS: Linux Installed from: Compiled sources 1. Select "Add Widget" in plasma 2. Add and remove some widgets 3. Change the top from "All Widgets" to "Widgets I have used before". You'll see that now the list is empty. I haven't found any way to fill this list, I think at least all the items from "Currently running widgets" should be there. However, given how useful (or unuseful) this entry seems, I wouldn't object in removing it completely. I actually think that the user that initially get's an empty list for "My favorite widgets" should get a hint that he can use the light-yellow star to mark widgets as favorite to populate the list and then revert automatically back to the previous setting, e.g. back to "All Widgets". But that might not be possible because of string-freeze at this time.
*** This bug has been marked as a duplicate of bug 172535 ***