When it's my turn to draw in isketch, my screen gets progressively blurrier in the draw area with each stroke. It makes it really hard to see what I'm drawing. Other people see it fine, but to me it appears blurry. What's going on?

Please tell us about your system, OS and the browser you're using to play first. Could be any number of issues but it's easier to narrow it down once we have that information.

Usually happens when you're zoomed in..

Press Ctrl +0

Or for IE - Page-> Zoom -> 100%
Firefox - View -> Zoom -> Reset
Safari -Page Icon -> Zoom -> Actual Size.