Ok, so for the past few weeks spotlight has not been working. It would not find things that I had recently put on my system. So I fiddled around with it by doing this: sh-3.2# mdutil -E / /: No index. It shot me a no index error. I kept trying different things including deleting the index file through the Finder. I finally turned off spotlight with mdutil -i off /. I restarted and tried to turn it back on and it would give me this error: sh-3.2# mdutil -i on / /: Error: unable to perform operation. (-100) No index. Then I did rm /.Spotlight-V100 and deleted the spotlight index and restarted. Now it searches for files and it has all the files in the index, but it no longer does calculator or dictionary searches. Using mdutil -E / returns this: sh-3.2# mdutil -E / /: No index. mdutil -s / returns this: sh-3.2# mdutil -s / /: No index. But I can still use spotlight to find files. Typing something into the menubar gives back accurate results without calculator or dictionary results. So what do I do to fix it without a reinstall of 10.5? This is my 2.4 ghz Santa Rosa Macbook Pro. The drive is 160 GB.