Is it just me, or has the layout been broken at webmasterworld for months?
I'm guessing that it has something to do with that big banner ad at the top. It's not responsive, and doesn't seem to resize when you're on a smaller screen. So you end up with a horizontal scrollbar.
A side effect is that you can't resize the text when you're on a tablet or phone, which makes everything too small to read.
Five minutes fiddling with the CSS will probably fix it (ps. I'm using Safari)