While working my way through some not-so-complicated tables earlier today, I ran into a Chrome bug (I believe) with table cell heights when using a rowspan.
This table will render incorrectly in Chrome:
The first two cells on the left will collapse to be as small as they can - just large enough for the text they contain. The third cell will then become very tall to cover the remaining space. In Firefox and Internet Explorer, all cells are equally spaces, as is the expected outcome. I’ve written up a more detailed bug report on the 3-1 Design site.