Scrollbar breaks when loaded page is already scrolled down

[hatsumatsu]

When your reload a page that is scrolled down half the way the scrollbars height calculation breaks. This can be fixed by adding the scrollers scrollTop value to the calculation:

line 93:

var contentHeight = scrollData.clearer.position().top - 
                    scrollData.content.position().top + 
                    scrollData.scroller.scrollTop();