Using easy tables v0.9 I had a very odd effect on a page using the Responsive theme: An H2 was floating to the right in Chrome immediately after a table.
It displayed OK in Firefox but firebug seemed to think the H2 extended up into the above table.
When I manually removed the align attribute (which was set to "left") from the table the problem went away.
But clearing it in the settings page also worked. (That leaves align="" in the HTML, but that seems to be ignored.) As I'm using CSS for alignment anyway, it made no difference to the display of the table.
Align is deprecated in HTML 4.01 and unsupported HTML 5 and the problem might be a side affect of that.