I am on OS 10.8.2, All Latest Updates, MacBook Pro 17', SSD all maxed out.
I don't remember having this issue prior to OS 10.8.2, to which I Upgraded from 10.7.4.
I did not try Deleting any Files or Folder to fix this yet!
I did recently Signed Out and back Into iCloud while on call with AppleCare.
This issue of - Spotlight Stops Searching Contacts - comes and goes!
This issue existed before and after my Sign Out and Into iCloud!!!
Below is the Log of my Latest Research:
Thursday, November 15, 2012
Re-indexed Spotlight on my MacBook Pro by Dragging my Macintosh HD in and out of Privacy Tab in Spotlight!
54 minutes remaining at halfway point. Looks like it could be a two hour project!
That took 1hr 9min on my SSD!!!
Problem still exists
Time Machine Backup ran during Re-Indexing, but I decided to let it do its thing!
Unchecked Contacts in Spotlight
Restarted
Checked Contacts in Spotlight
Problem still exists - even if it worked for the l1nu5r post on Apple Discussions below
Saturday, November 17, 2012
After 2 SuperDuper Clone Backups + Time Machine Backup - All Contacts can be Searched in Spotlight!!!! The Issue Fixed itself - All Contacts could be Searched in Spotlight, but... That "success" lasted only for a day:)!
Sunday, November 18, 2012
After my SuperDuper Clone Backup, Contacts could not be found, even after UnMounted External HDs, turned them off and Restarted, and Shut Down my Mac twice!
I Edit a Contact and that Contact showed up in Spotlight, but only that Contact
I did a Safe Boot - Nothing in Spotlight was available except Web and Wikipedia
I Shut Down for 2 min and Restarted. Spotlight did some more Indexing for about 1 minute!
That Edited Contact showed up in Spotlight, but only that Contact
My Best Guess:
This issue appears to be related to iCloud!
I hope Apple is reading this and all our posts!
Apple is welcome to call me...
I will be calling AppleCare soon!
I hope All Our Dots Will Connect, so that this Issue is fixed!!!
Stay tuned!