The search field on the left is not aligned with the Go button. Comparing with Safari 2.0, the entire section containing the search field and the button is shorter in TOT. The button is at the same height, but the field has moved up.
Created attachment 13660 [details] Screenshot
Created attachment 13661 [details] Screenshot from Safari 2 (expected rendering)
Created attachment 13662 [details] Reduction Layout in TOT is saner. The Store Locator has a rule to push the button down by 6px to account for the inherent misalignment in Safari 2.0 in <http://www.apple.com/buy/locator/styles.css>: html>body*#sidebar .search button.go{ position:relative; top:6px; } (That selector matches in WebKit but not in Gecko). This bug probably belongs in the evangelism department.
<rdar://problem/5068261>
Moving to evangelism and lowering priority to take it out of the P1 list.
Tested with Webkit r30123 and the bug is already fixed.