Thought I would update on my experience on this clutch issue.
Mine is a 330d, which has now just had its 4th clutch in 18,000 miles. The new clutch BMW brought out is for 4 cylinder cars only. Which is of no use to me.
Given that the car is out of warranty in a couple of months, I was very concerned about the prospect of paying for a new clutch every 6,000 miles. . . Following a call and discussion with BMW Customer Services they have agreed to warranty the clutch for another 24 months, after which they will review again and if its still an issue extend it again. I guess, as its a bit of a limited product (330d in manual form as opposed to linked to an auto unit) the likelihood of a new design is slim.
So - not a fix but a way forward. (Not ideal though and a bit of pain in the backside.)
Do like the car though and don't want to change at the moment.
330d Touring and Caterham 7 HPC