As recommended by some people here, I went to a nearby open field with nothing around me for hunderds of meters. I turned on the GPS + started GPS status and waited for a few minutes....5 minutes.. nothing...10 minutes... nothing...15 minutes...still nothing and getting desperate. Just as I walked back to my car: bang! 11/16 satellites found me!!
Since then GPS locking is a lot quicker. Even in house it's only 3 to 5 seconds and accurate.
As an active marathonrunner I almost depend on Endomondo which uses GPS to track me while I'm running. Thank you, thank you, thank you all!
Edit: I too confirm that the LED blinks fine in build #45.
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One small X for a man, one CM10 rom for mankind.