Updated to GB27 - Now my notification light for Text and Missed Calls does not work. Anyone else?

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http://forums.androidcentral.com – I use Handscent SMS - but the stock message app also does not work. No light for texts or missed calls. I tried to reinstall app. I hear that clearing cache may help? Not sure how to do this though. When I use powerkey, volumne down it just says 'install custom OS'... perhaps I must go further? Any thoughts would be helpful! (P.S I tried looking at all me notification settings and even toggled a couple times. Did not work. :( ) Thanks! Epic 4G Touch with 4.1 from Kies. (GB27) (HowTos)