I noticed that when I have a lof of tabs open on Safari it eventually starts to "cut" the websites in half. It's like if it loaded only the beginning of a website, till the scroll begins.. and then when I scroll down, it's totally empty. Like a white layer covering the second half of the page. Even if I reload the page, it doesn't work.. and once it starts, all the other tabs suffer the same issue. I need to close and re-open Safari. Take a look at the print screen. Have you guys seen it before??