When I click the little arrow on the left, I have as one of the possibilities: "unstar as interesting". This can also be done from transcript (in this way it's different from "cancel stars".)
As you can see, I have removed star from your previous message.
If I understand correctly that was your intention - since the post has been dealt with, the message about that specific post needs to be neither starred nor pinned.
For example, this message by SBA is pinned now, the post was deleted already. 1) Clicking "unpin" will leave the star (but it will be no longer pinned). 2) Clicking "cancel stars" will also remove the star completely. (So it will not be shown among starred messages.)
I thought that 2) is the thing to do. (This can be done only by a room owner; it does not matter whether they are also poster of that message.)
Okay I misread your original message. I thought you meant that I had unstarred as well as unpinned (which I infer from what you said later that I didn't), and hence I went to find out how that could happen. Indeed I had tested and found that the GM script does just that. However, I had no particular reason to leave the messages starred; I had just clicked "unpinned" to 'undo' my original action of "pin", and I didn't realize that there weren't inverses...
