I have a problem with a bug with Word 2010. Quite often tooltips or whatever they are called don't disappear. If they are big they obscure a lot (even if Word isn't in the foreground) and the only way to get rid of them is to restart Word. This can be frustrating. In the screen shot at http://www.benkenward.com/untitled.jpg
you can see that there are two tool tips, the "Markup Area" to the right and the "Ben Kenward commented" in the middle. The one on the right got stuck.
How do I fix this bug?