Strange margins of plugins content

Is it possible to make the same margins for the plugin content? Why margins are different on the left and right side? It looks like a layout bug.
Elements don’t have any specific styles except display: block; margin: 0; width: 100%.

@kerrishotts thoughts? ^

If you look at the buttons at the bottom, the margins appear equal – it’s likely that there’s a CSS style that’s not playing nice with the default paddings. Would be nice if you could share the CSS that you’re using?