Today I found out about a little CSS quirk/feature (haven’t quite decided yet): Image tags are being assigned a seemingly undeserved 5px of padding-bottom.
The weird thing is that this does not show up as padding in Firebug/Web Inspector - my CSS reset had already set it to 0. The image probably illustrates better what I mean - see the little extra space below?
Well, it turns out that images are inline elements, which means they have extra space at the bottom for the letter ‘tails’. These are the lines that go a little lower than the rest in such letters as y, p or q.
The solution is to apply
display:block to the images in question.