CTRL+Enter in Internet Explorer
CTRL+Enter is really a very useful feature in Internet Explorer. We type google and CTRL+Enter automatically prefixes the TLD suffix and www and navigates to the URL. Myself and my friend faced a piquant situation yesterday. It was not working.
After a brief tweaks and fiddling with IE Options, we observed that this is dependent on Tools -> Internet Options -> Content -> Autocomplete checkbox to be enabled. Only then it works.
Also, it would be interesting to go a bit deep into the technical background of CTRL+Enter too and perhaps this technical background also helps us to customize it. Check out Jeff's WebLog for details.