by AL Rachels.
There is a work-around that will let you get to the other parts of the page, if you have to mark something before the fix comes out. Use the Page Up and Page Down buttons. You can also use the middle mouse button - click it, then slide the mouse up or down. Just be careful what you have selected when doing it...otherwise you might draw something you don't want to.
Both of these work for me. in Firefox and Chrome.