Hi,
we have found where the problem is:
it is in portfolio plugin (abdev-portfolio/css/portfolio_shortcode.css) @ line 28
it misses width: 100%; rule, it should look like this:
.ab_latest_portfolio figure img {
position: relative;
display: block;
opacity: 0.7;
width: 100%;
}
we will fix this in an update soon, but here is the fix so you can do it.
You can also give us login data and we will fix it for you.
Cheers