[Dillo-dev] [bug]: CSS sets insanely huge vertical extent

This small bit of HTML (attached) renders with an enormous vertical extent in Dillo - I have to hold down the mouse in the lower half of the scrollbar for several seconds before the slider moves even one pixel! Strangely, if you take out the "<span>"s then the vertical extent is *much* smaller, although still far too large. What's going on? Regards, Jeremy Henty