Count me in as well. It's seems to be worse in the morning; the creaking and popping is driving me nuts. I've tried to place some shims in the area under the rear window where the cheap plastic surround is located which seems to be the cause of the noises. I will try and remove all covers and see if it still keeps making noise. Plan to have dealer check it out as well.

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2012 328i Luxury, Jet Black/Saddle Brown (ED 8/9/12)
2012 X5 35i Sport Black Sapphire/Black/Dark Bamboo, Active Vent Seats, Premium Sound, Convenience, Soft Close Doors, Running Boards, BMW Apps
2009 335i Jet Black/Oyster
2007 X5 3.0 Black Sapphire/Beige (Sold)
2007 335iC Alpine White/Red (ED 11/15/06) (Sold)
2004 545ia Jet Black/Black (Retired)
2001 525ia Jet Black/Sand (Retired)
1995 540ia Jet Black/Black (Retired)
1992 325ia Jet Black/Gray (Retired)