Expose & Spaces keeps crashing my Preferences

Hey guys,

I'm quite puzzled, to say the least: Every time I try opening "Exposé & Spaces" in my Preferences nothing happens. If I try opening "Exposé & Spaces" again my Preferences will crash and the happy Crash Reporter will ask me to re-open Preferences.

Now to be perfectly hones: I've googled the problem and there are, as far as I can see, only few who have experienced the same problem and up to now I haven't found a working solution on how to open "Exposé & Spaces".

Do you guys have any idea?

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I'm running a 13MBP with SL10.6.7. Never had any troubles - well, except for now.

 

oooops, I accidentally misspelled my version … running 10.6.8
sorry about that :/
do yo u have, by any chance, another idea which could help me out?