System Preferences Exposé & Spaces Quit Unexpectedly

Question

All other preferences work as normal.  (System Preferences > Exposé & Spaces) just shows "Loading Exposé and Spaces..." and nothing comes up.  If I select it again I get a Problem Report for System Preferences.  This menu function was accessed within the last week and was functioning as normal.  As far as this problem goes, I have repaired the disk permissions, cleared the caches at "~/Library/Caches" and the preferences at "~/Library/Preferences/com.apple.systempreferences.plist".  This removal of the plist hasn't reset the spaces or exposé to default -- they remain as were configured earlier this week.
Any other suggestions would be greatly appreciated.
May or may not be related to the issue : (although I feel that this may have nothing to do with it)
This week had to take it to the Apple Store for a trackpad height adjust.  There also was a diagnostic (looked like some kind of os9 window) and they probably reset the pram.  Upon booting at home I had noticed that my settings for my home network were gone, and had to reconfigure.  Also a couple of 3rd party programs needed a reinstall.
regards,
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Answer 1

MacGunt wrote:
Ya, I'd say it's likely something in your preferences folder. What you could try is quitting all your apps, moving all of the plist files to a new folder and testing it. If this fixes it then put those plists back 5 or 10 at a time until you've determined which file is casuing the problem.
This suggestion sounds in the right direction.  I will probably have to do that soon but I am a bit confused about "all of the plist files."  Would I do this to the entire ~/Library/Preferences?
I also used Pacifist to extract and install Expose.prefPane and I noticed something different for Expose.prefPane.  The Sharing & Permission under Get Info show:  username(Me) /Read & Write, staff / Read only, and everyone / Read only.  The other .prefPane files show: system / Read & Write, wheel / Read only, everyone / Read only.  This may or may not be at fault, but I am wondering if you or anyone else's /System/Library/PreferencePanes shows this to be standard.
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