Vimperator Style Extension for Safari 5

You could try recreating your Safari Preferences plist:

1. Quit Safari.

2. Open Finder -> Library -> Preferences

3. Move com.apple.Safari.plist to your Desktop.

4. Open Safari.

There is the HTML <address>-Tag and hCard, which are supported by Safari and are used for semantic data. Unfortunately, there is no data detector in Safari for those standards.

There is a workaround, until those detectors are implemented, by using "Mail Contents of This Page" from the File menu.