Yes quite annoying. This happens to my profile too. I have to delete the gestures. Not all the gestures are published on my whiteboard. Also my received public gifts appear on my whiteboard. This occurs since a cpl of weeks.
Your whiteboard is only big enough for a short message to someone else.
Me either maybe another up-date in the web-cite
Go to someone's whiteboard on their profile on that list and press on whiteboard and what comes up is this little box that you can write a message to someone else. You can't write in your own whiteboard. OK? Maybe you still don't get what the whiteboard is.