Just in the last few days, all of a sudden about 75% of the time when swiping back to the previous page, I have to do it twice. The first swipe back just results in a blank white page, and the second swipe back gets me to where I want to be. Doesn't do this all the time, but most of the time. I reset Safari, no change. I'm on Safari 6.0.5 and OS X 10.8.4. Any ideas? Pretty annoying, not sure why this started.