I have no such problems with my carbon black M-sport...

http://www.xoutpost.com/bmw-sav-foru...0d-msport.html

I've had it for over a month now. However it has all been city and highway driving only - it has not been on any unsealed roads.
Isn't it the function of mudflaps to help minimise such damage...?

__________________
2009 e70 X5 30d MY10
Innovations | MSport | Carbon Black | Black Nevada | Aluminium Trim | 20" 227M | Panoramic Roof | Rear Side Sunblinds | 6NF | 3rd Row | Self-levelling Suspension | 35% Tint