Think you are getting commercial quality flawless code with a paid WordPress theme? Think again: commercial themes are boobytraps for the unwary.
From the beginning WordPress has generally looked great when going out with visitors but she dresses awfully sloppily around the house. Current previews of the updated WordPress 2.4 Admin interface show a getup which looks worse if anything, than what’s there now.
XRay, this amazing – and free – bookmarklet tells you all the CSS and structure for any element on a page.