Here's another "suggestion"--can't vouch for it but if you don't trash the original it shouldn't hurt: Try this (no absolute promise that it will work):
- Go to your home folder
- Open the "Preferences" folder
- Look for a ".plis" file named "com.apple.systempreferences.plist"
- Drag it to the desktop
- Reboot
- Try accessing your preferences again. Any better?