Fixing duplicate 'open with' items in Mac OSX Lion

This happens now and again, ie I get duplicate 'open with' items in Mac OSX Lion, or it has old apps in there that are long gone.


Run this command in Terminal

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user


then quit and restart the Finder