Image gap

Just one of those CSS annoying problem that related to DOCTYPE.,_Tables,_and_Mysterious_Gaps

Spent good few hours scratching my head on this, I know I should have looked at the DOCTYPE generated by my editor (Eclipse Aptana) on the first instance, but I didn't.

And what makes it even worse, I don't actually need to put any DOCTYPE at all as I was developing HTML for email newsletter. Sigh.