For some strange reason (saving some money, possibly), LR decided to replace the traditionale brackets for the A-frame, the ones that are bolted to the chassis, with welded brackets.
Now they have found out that with time (but not much time has passed, one year or so...) the welded brackets may not be up to the job, resulting in the rear axle going astray, with inevitable disappointment of the driver, who finds himself driving a car with a will of its own.
It seems that the first vehicles are exempted, as probably LR still had some of the old brackets as stock, and that later ones are exempted too, as they reverted to the old system; in between, from VIN 736064 up to VIN 752152, all defenders should be inspected and, if the case be, rectified, by welding additional patches to the already welded brackets.
The service action should be carried out by LR workshops as the vehicle comes in for the first useful maintenance service.
bulletin now in english
sorry the diagram is in italian but it give you the idea of where to look
The picture below shows the bulletin on gtr website provided by the man who described the bulletin above
The numbers you can see that i have highlighted are Q036 UK
and Q036 EX (which i'm assuming refers to export)
reference:
A-frame issues in 2007 MY Defenders - LR4x4 - The Land Rover Forum