OpenCart Community

On the product discount page, when clicking the 'date start' or 'date end' it pops up that calendar. Well, if your browser is just the right size, it opens up below the box. Then if you click through the months, some months that start at the very end of the week, end up showing 6 rows for each week, so the calendar grows vertically just enough to cause the vertical scroll bar to show up. Which causes the entire page to shift. Then it goes back when the month is changed again. It's really irritating and could be fixed with a
overflow: -moz-scrollbars-vertical; /*ff*/
overflow-y: scroll; /*ie*/