I have to admit, this one is going to take me quite some time to fix. I need to get a Windows computer and try to see it happen to myself, and that may take some time. There's no Windows or Macs in our house, so....
In the meantime, there's no need to continue to report the problem. I'm aware of it and will get to it when I can. Until then, just scroll up an inch each time you enter a thread.
