Open System Preferences...
In the System Preferences window, click on Spotlight.
In Spotlight, click on the Privacy tab.
Drag your Macintosh HD icon into the list, click on it to highlight it in blue and then click the [-] minus button at the bottom of the list to remove it.

Spotlight will re-index the contents of the Macintosh HD.

I tried that.

It hasn't worked. Doesn't find anything, even though everything is there.

????

It doesn't re-index everything instantly.
It might take 4 or 5 hours, but you should see the top right Spotlight symbol slowly animating a white dot in its centre, right after the procedure.

If it doesn't, one would have to know if you copied everything back into the right places, in the correct order - like all music into the Users Music folder or all pictures into the Users Picture folder.

What happens if you just do a simple + F on the keyboard to Find items?

Leon...i will read this.

ClockWork. When i installed Snow Leopard, i took my music and photos (primarily, what i back up) and just dragged them into (for eg)....all photos into the Library/Photos (Sidebar) of iPhoto.

Is this not what i should have done?

Also, if i do a CMD+ F it brings up the search area but cannot find anything. (for eg...i type in Fleet Foxes) and their SHOULD be something but....blank....

???

Thanks for your (ongoing) help.

Again - I'm not entirely certain of what you've copied to where, yet the basic idea would be to copy the entire Users folder, as one folder, and then copy that whole folder back into the computer - and then move the separate Desktop, Documents, Library, Movies, Music, Pictures, Public, Sites and Download folders into the new Users folder.

Even better, to use an external drive in combination with SuperDuper to do a full and correct backup of your stuff in Tiger, and then have SuperDuper (which is compatible with Tiger, Leopard and Snow Leopard), copy everything back in the same order.

It sounds like you've not really copied everything back into the new System... or something of that nature - hard to tell in this instance without physically seeing it.

Privacy List Error
The item couldn't be added or removed because of an unknown error.

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Download TinkerTool and install it.

The first tab in TinkerTool will automatically appear - the first one named: Finder.
At the top of the Finder window, click a tick into the: Show hidden and system files, and then click once on the bottom-right rectangular button marked: Relaunch Finder.

Every file that is normally invisible will now be visible.

Go to your Dock and click once on the Finder.
In the Finder window, locate a folder called: .Spotlight-V100

If you can't access it, click on the folder once and hit your Apple-Command key + your I key, to get Info on that folder.
In its Get Info window, unlock the padlock, give Ownership to yourself and change the Permission from No Access to Read & Write, and then close the Info Window.

Open the .Spotlight-V100 folder and locate: Exclusion.plist - or _exclusion.plist and then Trash it and Empty the Trash.
Close the .Spotlight-V100 window.

Back in TinkerTool, untick the Show hidden and system files check box and then click the bottom-right Relaunch Finder button.
Then Quit TinkerTool.

Spotlight's Search function should now be functional again.

The .Spotlight-v100 folder is locked because the System doesn't want you to access it.

At this point, I'd try Trashing the whole .Spotlight-v100 folder.

and what happens if you shut it down, start it up and then follow the step back in Post # 2.

Another Privacy List Error?