Fantastic UX Design: the Google Chrome Developer Console

Yet another example of where the simple Chrome UI betrays the huge amount of thought that must have gone into its design and development: this is a log console done right.

If you scroll to any point in the Chrome 10 developer console while new logs are being appended to it, the scrollbar position  stays where you are and the logs are locked in place for your inspection:

However, if you scroll down to the very bottom of the window and release the scroll bar, then you get "tail -f" functionality - the window scrolls down automatically with new logs:

To pick just one example to contrast, Wireshark used a toolbar button to control this behaviour (below), while Google Chrome "just works" and does the right thing without any clutter.