CSS stylesheet rule rendering is incomplete. Two to note are colors and line positioning. Observe the heading on a variety of browsers. Many color-picker selected colors do not look like the ones displayed in the picker swatches. Show log option should be on the 'VIEW' menu as all other 'show xyz' are there.
Many users think view and show are synonyms.
This is most noticable in the Show Source window. I didnt check horizontal scroll but this may have similar problem. After scrolling to bottom of document, scrolling up to top overscrolls on many docs. The scroll bars can't be pulled to the very bottom or right edge. No information is lost but this is untidy.