I'm running ML 10.8.3 on my 24" aluminum iMac (2008) and have run into a problem with Spotlight that I cannot figure out. Spotlight will index just fine, and gives me results in all categories when I do a search just like it's supposed to. Whenever I try to launch any of the search results, nothing happens, absolutely nothing. As an example... I click the Spotlight icon in the menubar, type in "Automator" as my query, get my results in categories like Top Hit, Applications, Documents, Folders, Messages, etc... When I click on any of these items, nothing happens. Apps won't launch, documents won't open, "Show All In Finder" does nothing, Folders won't open. I've deleted and re indexed the Spotlight index several times but that doesn't help. I've also repaired permissions, done daily weekly and monthly maintenance, cleaned caches, rebuilt launch services, etc... I've done all that I can think of but still have this issue. Has anyone else had this problem? Is there a solution to get Spotlight to work like it used to?