Hi There,
It doesn't look like it's been fixed on your site neither on mine, I viewed your site with Safari, Mac.. unless we're talking on different issues, what categories you refer the problem to, portfolios ? if so maybe the "nav" is wrapped but still when clicking on the categories the page being pushed from the right to the left and you get another page scroll, also, this is happening even without resizing the page, try to just click on the portfolio categories one after another or randomly and you will see the extra scroll and that the page is being pushed.
In the start I thought this issue is related to my custom.css and other customizations so i stripped it all off, i mean removed all the code from custom css, and even some plugins, and didn't find anything related that might be causing this..
So.......?
Please anyone..