Hidden settings Safari 4

A study of Safari 4 revealed the following hidden settings:

• DebugSafari4TabBarIsOnTop
  bookmarks bar at the top
• DebugSafari4IncludeToolbarRedesign
  new toolbar (plus glued to the address bar)
• DebugSafari4IncludeGoogleSuggest
  tips on entering text into the Google search box
• DebugSafari4IncludeFancyURLCompletionList
  an elaborate list of hints when entering text in the address bar
• DebugSafari4IncludeTopSites
  Enable / Disable Top Sites
• DebugSafari4LoadProgressStyle
  obviously refers to the fact that progress is no longer shown in the address bar
• DebugSafari4IncludeFlowViewInBookmarksViewView
  disables coverflow in history

All this is enabled by default. In Mac OS are disabled by entering in the Terminal:

defaults write com.apple.Safari name Settings -boolean NO

To return as it was, it is written YES instead of NO . In Windows, you can most likely add the appropriate keys in the registry.

UPD: To enable the page loading progress, you must disable both the DebugSafari4LoadProgressStyle and DebugSafari4IncludeToolbarRedesign. This feature is charred here .
UPD 2: Further research led to the creation of a separate menu for managing settings .
UPD 3: Thanks for the karma. Refined, merged and moved to the Safari blog .
UPD 4: A similar solution for Windows ibid .