I have had a couple of issues with 10.5 spotlight recently.
A little while ago, sometimes I would search for something that I
knew was there, like say the Disk Utility application. And Spotlight would nto find it. But if I opend up "Show all" and included system files, it would find it. Launching it from there and I would get my Disk Utility. Later on, if I would search for DU again, Spotlight seemed to remember that I wanted it before, and DU comes up in the drop down list.
But now, I searched for Microsoft's Autoupdate program for Office 2008. Didn't find aything. Again I know it's there, and again opening up Show All and enabling system files, spotlight finds it. But this time launching it from there and then trying to search for it again, it does not show up in the drop down. Ih ave to go to "show all" every time and enable system file searching.
Why did it work with DU but not MS AutoUpdate?
While I'm at it, if you type garbage into spotlight and it doesn't find anything, you're only left with two options. "No Results Found" and "Spotlight Preferences". You can't select the "show all" or whatever to get the "more powerful" finder-window based spotlight search. For something like Autoupdate, this sucks because typing in autoupdate you can't get to the finder spotlight window, you have to type something else in first, then hit show all,
then enable system file searching or whatever criterion you need (but spotlight never remembers)
THEN change your search terms back to "autoupdate", and
FINALLY be able to select the application. While I agree that they made a lot of fundamental improvements to the Spotlight engine and Spotlight philosophy from Tiger to Leopard, it still has some pretty glaring deficiencies in usability at times.
Where's the "Stop sucking" or "go back to Tiger where it was better" preference hehe

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Ruahrc