I'm having the following issue with the latest version, also saw it being posted in the beginning of the thread.
EDIT: Seems posting a YouTube video doesn't work? Here's the URL:
http://www.youtube.com/watch?v=-xY-79Iiu6c
EDIT x2: Apparently there's a 0.2.1 version that there's a link too on page 4 of this thread. I tried it, and it's still happening altough with one difference. The drawing error only happens while you are actively dragging the scroll bar, the moment you release or stop moving it, it displays the level as normal.