[JoshTriplett]

Doesn't happen here; the page doesn't change when I move the mouse over the "next page" corner, other than the folding up of that corner. Everything remains crisp. What browser did you use?

[pacmon]

The blurring happens in Firefox 10. It also makes the whole 'page' shift a couple pixels. It's really disruptive and ruins the whole effect.

[JoshTriplett]

Interesting. I run Firefox 10, and it doesn't happen here.